684025693837 has 2 divisors, whose sum is σ = 684025693838. Its totient is φ = 684025693836.

The previous prime is 684025693831. The next prime is 684025693859. The reversal of 684025693837 is 738396520486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 596994203716 + 87031490121 = 772654^2 + 295011^2 .

It is a cyclic number.

It is not a de Polignac number, because 684025693837 - 2²³ = 684017305229 is a prime.

It is a super-2 number, since 2×684025693837² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684025693831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342012846918 + 342012846919.

It is an arithmetic number, because the mean of its divisors is an integer number (342012846919).

Almost surely, 2^684025693837 is an apocalyptic number.

It is an amenable number.

684025693837 is a deficient number, since it is larger than the sum of its proper divisors (1).

684025693837 is an equidigital number, since it uses as much as digits as its factorization.

684025693837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52254720, while the sum is 61.

The spelling of 684025693837 in words is "six hundred eighty-four billion, twenty-five million, six hundred ninety-three thousand, eight hundred thirty-seven".