70115913 has 18 divisors (see below), whose sum is σ = 117814554. Its totient is φ = 40065984.

The previous prime is 70115887. The next prime is 70115921. The reversal of 70115913 is 31951107.

It is a happy number.

70115913 is a `hidden beast` number, since 70 + 1 + 1 + 591 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 67765824 + 2350089 = 8232^2 + 1533^2 .

It is not a de Polignac number, because 70115913 - 2¹² = 70111817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70115953) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 79056 + ... + 79937.

It is an arithmetic number, because the mean of its divisors is an integer number (6545253).

Almost surely, 2^70115913 is an apocalyptic number.

It is an amenable number.

70115913 is a deficient number, since it is larger than the sum of its proper divisors (47698641).

70115913 is a wasteful number, since it uses less digits than its factorization.

70115913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159013 (or 159003 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 27.

The square root of 70115913 is about 8373.5245267450. The cubic root of 70115913 is about 412.3558857451.

The spelling of 70115913 in words is "seventy million, one hundred fifteen thousand, nine hundred thirteen".