70309917 has 8 divisors (see below), whose sum is σ = 104162880. Its totient is φ = 46873260.

The previous prime is 70309913. The next prime is 70309961. The reversal of 70309917 is 71990307.

It is not a de Polignac number, because 70309917 - 2² = 70309913 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70309913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1302009 + ... + 1302062.

It is an arithmetic number, because the mean of its divisors is an integer number (13020360).

Almost surely, 2^70309917 is an apocalyptic number.

It is an amenable number.

70309917 is a deficient number, since it is larger than the sum of its proper divisors (33852963).

70309917 is a wasteful number, since it uses less digits than its factorization.

70309917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604080 (or 2604074 counting only the distinct ones).

The product of its (nonzero) digits is 11907, while the sum is 36.

The square root of 70309917 is about 8385.1008938474. The cubic root of 70309917 is about 412.7358519000.

The spelling of 70309917 in words is "seventy million, three hundred nine thousand, nine hundred seventeen".