70645939 has 16 divisors (see below), whose sum is σ = 88254208. Its totient is φ = 55056672.

The previous prime is 70645921. The next prime is 70645961. The reversal of 70645939 is 93954607.

It is a cyclic number.

It is not a de Polignac number, because 70645939 - 2⁵ = 70645907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70645895 and 70645904.

It is not an unprimeable number, because it can be changed into a prime (70645139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304 + ... + 11890.

It is an arithmetic number, because the mean of its divisors is an integer number (5515888).

Almost surely, 2^70645939 is an apocalyptic number.

70645939 is a deficient number, since it is larger than the sum of its proper divisors (17608269).

70645939 is a wasteful number, since it uses less digits than its factorization.

70645939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11674.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 70645939 is about 8405.1138600259. The cubic root of 70645939 is about 413.3923167791.

The spelling of 70645939 in words is "seventy million, six hundred forty-five thousand, nine hundred thirty-nine".