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130579157 = 264749331
BaseRepresentation
bin1111100100001…
…11101011010101
3100002201002221002
413302013223111
5231412013112
620542433045
73143622152
oct762075325
9302632832
10130579157
1167788065
1237892785
132108c297
14134b1229
15b6e51c2
hex7c87ad5

130579157 has 4 divisors (see below), whose sum is σ = 130631136. Its totient is φ = 130527180.

The previous prime is 130579147. The next prime is 130579171. The reversal of 130579157 is 751975031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 751975031 = 1993778769.

It is a cyclic number.

It is not a de Polignac number, because 130579157 - 26 = 130579093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 130579157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130579117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22019 + ... + 27312.

It is an arithmetic number, because the mean of its divisors is an integer number (32657784).

Almost surely, 2130579157 is an apocalyptic number.

It is an amenable number.

130579157 is a deficient number, since it is larger than the sum of its proper divisors (51979).

130579157 is an equidigital number, since it uses as much as digits as its factorization.

130579157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51978.

The product of its (nonzero) digits is 33075, while the sum is 38.

The square root of 130579157 is about 11427.1237413445. The cubic root of 130579157 is about 507.3308674674.

The spelling of 130579157 in words is "one hundred thirty million, five hundred seventy-nine thousand, one hundred fifty-seven".

Divisors: 1 2647 49331 130579157