709620913 has 4 divisors (see below), whose sum is σ = 710199540. Its totient is φ = 709042288.

The previous prime is 709620893. The next prime is 709620971. The reversal of 709620913 is 319026907.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 583125904 + 126495009 = 24148^2 + 11247^2 .

It is a cyclic number.

It is not a de Polignac number, because 709620913 - 2⁵ = 709620881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (709620713) 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, 287470 + ... + 289927.

It is an arithmetic number, because the mean of its divisors is an integer number (177549885).

Almost surely, 2^709620913 is an apocalyptic number.

It is an amenable number.

709620913 is a deficient number, since it is larger than the sum of its proper divisors (578627).

709620913 is a wasteful number, since it uses less digits than its factorization.

709620913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578626.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 709620913 is about 26638.7107983851. The cubic root of 709620913 is about 891.9533384166.

The spelling of 709620913 in words is "seven hundred nine million, six hundred twenty thousand, nine hundred thirteen".