685413399053 has 2 divisors, whose sum is σ = 685413399054. Its totient is φ = 685413399052.

The previous prime is 685413399049. The next prime is 685413399067. The reversal of 685413399053 is 350993314586.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 655732311529 + 29681087524 = 809773^2 + 172282^2 .

It is a cyclic number.

It is not a de Polignac number, because 685413399053 - 2² = 685413399049 is a prime.

It is a super-3 number, since 3×685413399053³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 685413399053.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685413398053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342706699526 + 342706699527.

It is an arithmetic number, because the mean of its divisors is an integer number (342706699527).

Almost surely, 2^685413399053 is an apocalyptic number.

It is an amenable number.

685413399053 is a deficient number, since it is larger than the sum of its proper divisors (1).

685413399053 is an equidigital number, since it uses as much as digits as its factorization.

685413399053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10497600, while the sum is 56.

The spelling of 685413399053 in words is "six hundred eighty-five billion, four hundred thirteen million, three hundred ninety-nine thousand, fifty-three".