684279891037 has 2 divisors, whose sum is σ = 684279891038. Its totient is φ = 684279891036.

The previous prime is 684279891023. The next prime is 684279891137. The reversal of 684279891037 is 730198972486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 682087684996 + 2192206041 = 825886^2 + 46821^2 .

It is a cyclic number.

It is not a de Polignac number, because 684279891037 - 2²³ = 684271502429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 684279891037.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684279891137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342139945518 + 342139945519.

It is an arithmetic number, because the mean of its divisors is an integer number (342139945519).

Almost surely, 2^684279891037 is an apocalyptic number.

It is an amenable number.

684279891037 is a deficient number, since it is larger than the sum of its proper divisors (1).

684279891037 is an equidigital number, since it uses as much as digits as its factorization.

684279891037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36578304, while the sum is 64.

The spelling of 684279891037 in words is "six hundred eighty-four billion, two hundred seventy-nine million, eight hundred ninety-one thousand, thirty-seven".