70513957 has 4 divisors (see below), whose sum is σ = 70569216. Its totient is φ = 70458700.

The previous prime is 70513931. The next prime is 70513969. The reversal of 70513957 is 75931507.

It is a happy number.

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 70513957 - 2¹⁹ = 69989669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70513057) 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, 25669 + ... + 28282.

It is an arithmetic number, because the mean of its divisors is an integer number (17642304).

Almost surely, 2^70513957 is an apocalyptic number.

It is an amenable number.

70513957 is a deficient number, since it is larger than the sum of its proper divisors (55259).

70513957 is a wasteful number, since it uses less digits than its factorization.

70513957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55258.

The product of its (nonzero) digits is 33075, while the sum is 37.

The square root of 70513957 is about 8397.2588979976. The cubic root of 70513957 is about 413.1347206705.

The spelling of 70513957 in words is "seventy million, five hundred thirteen thousand, nine hundred fifty-seven".