709640965 has 32 divisors (see below), whose sum is σ = 974592000. Its totient is φ = 491008320.

The previous prime is 709640941. The next prime is 709640969. The reversal of 709640965 is 569046907.

It is not a de Polignac number, because 709640965 - 2¹³ = 709632773 is a prime.

It is a super-2 number, since 2×709640965² = 1007180598412262450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709640969) 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 31 ways as a sum of consecutive naturals, for example, 250326 + ... + 253144.

It is an arithmetic number, because the mean of its divisors is an integer number (30456000).

Almost surely, 2^709640965 is an apocalyptic number.

It is an amenable number.

709640965 is a deficient number, since it is larger than the sum of its proper divisors (264951035).

709640965 is a wasteful number, since it uses less digits than its factorization.

709640965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3057.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 709640965 is about 26639.0871652915. The cubic root of 709640965 is about 891.9617397473.

The spelling of 709640965 in words is "seven hundred nine million, six hundred forty thousand, nine hundred sixty-five".