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130801979 = 7111698727
BaseRepresentation
bin1111100101111…
…10000100111011
3100010010102120202
413302332010323
5231441130404
620551312415
73145540610
oct762760473
9303112522
10130801979
116791a510
123797b70b
1321139829
141352c507
15b73b21e
hex7cbe13b

130801979 has 8 divisors (see below), whose sum is σ = 163077888. Its totient is φ = 101923560.

The previous prime is 130801973. The next prime is 130802011. The reversal of 130801979 is 979108031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 130801979 - 24 = 130801963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130801973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 849287 + ... + 849440.

It is an arithmetic number, because the mean of its divisors is an integer number (20384736).

Almost surely, 2130801979 is an apocalyptic number.

130801979 is a deficient number, since it is larger than the sum of its proper divisors (32275909).

130801979 is a wasteful number, since it uses less digits than its factorization.

130801979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698745.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 130801979 is about 11436.8692831561. The cubic root of 130801979 is about 507.6192755152.

The spelling of 130801979 in words is "one hundred thirty million, eight hundred one thousand, nine hundred seventy-nine".

Divisors: 1 7 11 77 1698727 11891089 18685997 130801979