709649332391 has 2 divisors, whose sum is σ = 709649332392. Its totient is φ = 709649332390.

The previous prime is 709649332373. The next prime is 709649332411. The reversal of 709649332391 is 193233946907.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 709649332391 - 2²⁶ = 709582223527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (709649332361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354824666195 + 354824666196.

It is an arithmetic number, because the mean of its divisors is an integer number (354824666196).

Almost surely, 2^709649332391 is an apocalyptic number.

709649332391 is a deficient number, since it is larger than the sum of its proper divisors (1).

709649332391 is an equidigital number, since it uses as much as digits as its factorization.

709649332391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6613488, while the sum is 56.

The spelling of 709649332391 in words is "seven hundred nine billion, six hundred forty-nine million, three hundred thirty-two thousand, three hundred ninety-one".