685078375 has 8 divisors (see below), whose sum is σ = 854977968. Its totient is φ = 548062600.

The previous prime is 685078357. The next prime is 685078399. The reversal of 685078375 is 573870586.

It is not a de Polignac number, because 685078375 - 2⁵ = 685078343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2740189 + ... + 2740438.

It is an arithmetic number, because the mean of its divisors is an integer number (106872246).

Almost surely, 2^685078375 is an apocalyptic number.

685078375 is a deficient number, since it is larger than the sum of its proper divisors (169899593).

685078375 is an equidigital number, since it uses as much as digits as its factorization.

685078375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5480642 (or 5480632 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 49.

The square root of 685078375 is about 26174.0018911897. The cubic root of 685078375 is about 881.5496005285.

The spelling of 685078375 in words is "six hundred eighty-five million, seventy-eight thousand, three hundred seventy-five".