70939513 has 4 divisors (see below), whose sum is σ = 71481168. Its totient is φ = 70397860.

The previous prime is 70939507. The next prime is 70939529. The reversal of 70939513 is 31593907.

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 a de Polignac number, because none of the positive numbers 2^k-70939513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70939573) 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, 270631 + ... + 270892.

It is an arithmetic number, because the mean of its divisors is an integer number (17870292).

Almost surely, 2^70939513 is an apocalyptic number.

It is an amenable number.

70939513 is a deficient number, since it is larger than the sum of its proper divisors (541655).

70939513 is a wasteful number, since it uses less digits than its factorization.

70939513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541654.

The product of its (nonzero) digits is 25515, while the sum is 37.

The square root of 70939513 is about 8422.5597652970. The cubic root of 70939513 is about 413.9641520300.

The spelling of 70939513 in words is "seventy million, nine hundred thirty-nine thousand, five hundred thirteen".