685351528423 has 2 divisors, whose sum is σ = 685351528424. Its totient is φ = 685351528422.

The previous prime is 685351528403. The next prime is 685351528429. The reversal of 685351528423 is 324825153586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 685351528423 - 2¹⁷ = 685351397351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685351528429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342675764211 + 342675764212.

It is an arithmetic number, because the mean of its divisors is an integer number (342675764212).

Almost surely, 2^685351528423 is an apocalyptic number.

685351528423 is a deficient number, since it is larger than the sum of its proper divisors (1).

685351528423 is an equidigital number, since it uses as much as digits as its factorization.

685351528423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912000, while the sum is 52.

The spelling of 685351528423 in words is "six hundred eighty-five billion, three hundred fifty-one million, five hundred twenty-eight thousand, four hundred twenty-three".