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180907313 = 363149823
BaseRepresentation
bin10101100100001…
…10110100110001
3110121102001011212
422302012310301
5332303013223
625541245505
74324454366
oct1262066461
9417361155
10180907313
1193132384
1250703895
132b630b62
141a05246d
1510d37278
hexac86d31

180907313 has 4 divisors (see below), whose sum is σ = 180960768. Its totient is φ = 180853860.

The previous prime is 180907297. The next prime is 180907339. The reversal of 180907313 is 313709081.

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.

It is a cyclic number.

It is not a de Polignac number, because 180907313 - 24 = 180907297 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 180907313.

It is not an unprimeable number, because it can be changed into a prime (180907613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21281 + ... + 28542.

It is an arithmetic number, because the mean of its divisors is an integer number (45240192).

Almost surely, 2180907313 is an apocalyptic number.

It is an amenable number.

180907313 is a deficient number, since it is larger than the sum of its proper divisors (53455).

180907313 is an equidigital number, since it uses as much as digits as its factorization.

180907313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53454.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 180907313 is about 13450.1789207430. The cubic root of 180907313 is about 565.5687102617.

The spelling of 180907313 in words is "one hundred eighty million, nine hundred seven thousand, three hundred thirteen".

Divisors: 1 3631 49823 180907313