70713815 has 4 divisors (see below), whose sum is σ = 84856584. Its totient is φ = 56571048.

The previous prime is 70713791. The next prime is 70713817. The reversal of 70713815 is 51831707.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51831707 = 373 ⋅138959.

It is a cyclic number.

It is not a de Polignac number, because 70713815 - 2⁶ = 70713751 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 (70713817) 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, 7071377 + ... + 7071386.

It is an arithmetic number, because the mean of its divisors is an integer number (21214146).

Almost surely, 2^70713815 is an apocalyptic number.

70713815 is a deficient number, since it is larger than the sum of its proper divisors (14142769).

70713815 is a wasteful number, since it uses less digits than its factorization.

70713815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14142768.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 70713815 is about 8409.1506705493. The cubic root of 70713815 is about 413.5246689741.

The spelling of 70713815 in words is "seventy million, seven hundred thirteen thousand, eight hundred fifteen".