709691431 has 2 divisors, whose sum is σ = 709691432. Its totient is φ = 709691430.

The previous prime is 709691419. The next prime is 709691461. The reversal of 709691431 is 134196907.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-709691431 is a prime.

It is a super-3 number, since 3×709691431³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (709691461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354845715 + 354845716.

It is an arithmetic number, because the mean of its divisors is an integer number (354845716).

Almost surely, 2^709691431 is an apocalyptic number.

709691431 is a deficient number, since it is larger than the sum of its proper divisors (1).

709691431 is an equidigital number, since it uses as much as digits as its factorization.

709691431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 709691431 is about 26640.0343655934. The cubic root of 709691431 is about 891.9828831500.

The spelling of 709691431 in words is "seven hundred nine million, six hundred ninety-one thousand, four hundred thirty-one".