9913151979 has 32 divisors (see below), whose sum is σ = 16368480000. Its totient is φ = 5892642432.

The previous prime is 9913151957. The next prime is 9913151981. The reversal of 9913151979 is 9791513199.

9913151979 is a `hidden beast` number, since 9 + 91 + 31 + 519 + 7 + 9 = 666.

It is not a de Polignac number, because 9913151979 - 2¹¹ = 9913149931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9913151779) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 559629 + ... + 577070.

It is an arithmetic number, because the mean of its divisors is an integer number (511515000).

Almost surely, 2^9913151979 is an apocalyptic number.

9913151979 is a deficient number, since it is larger than the sum of its proper divisors (6455328021).

9913151979 is a wasteful number, since it uses less digits than its factorization.

9913151979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136744 (or 1136738 counting only the distinct ones).

The product of its digits is 688905, while the sum is 54.

The square root of 9913151979 is about 99564.8129561845. The cubic root of 9913151979 is about 2148.1796005533.

The spelling of 9913151979 in words is "nine billion, nine hundred thirteen million, one hundred fifty-one thousand, nine hundred seventy-nine".