684957390937 has 4 divisors (see below), whose sum is σ = 688783968720. Its totient is φ = 681130813156.

The previous prime is 684957390889. The next prime is 684957390983. The reversal of 684957390937 is 739093759486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 684957390937 - 2³¹ = 682809907289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684957390137) 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, 1913288623 + ... + 1913288980.

It is an arithmetic number, because the mean of its divisors is an integer number (172195992180).

Almost surely, 2^684957390937 is an apocalyptic number.

It is an amenable number.

684957390937 is a deficient number, since it is larger than the sum of its proper divisors (3826577783).

684957390937 is a wasteful number, since it uses less digits than its factorization.

684957390937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3826577782.

The product of its (nonzero) digits is 308629440, while the sum is 70.

The spelling of 684957390937 in words is "six hundred eighty-four billion, nine hundred fifty-seven million, three hundred ninety thousand, nine hundred thirty-seven".