684601375 has 8 divisors (see below), whose sum is σ = 854382672. Its totient is φ = 547681000.

The previous prime is 684601363. The next prime is 684601381. The reversal of 684601375 is 573106486.

It is a happy number.

It is not a de Polignac number, because 684601375 - 2¹¹ = 684599327 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, 2738281 + ... + 2738530.

It is an arithmetic number, because the mean of its divisors is an integer number (106797834).

Almost surely, 2^684601375 is an apocalyptic number.

684601375 is a deficient number, since it is larger than the sum of its proper divisors (169781297).

684601375 is an equidigital number, since it uses as much as digits as its factorization.

684601375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5476826 (or 5476816 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 684601375 is about 26164.8882092013. Note that the first 3 decimals coincide. The cubic root of 684601375 is about 881.3449539721.

The spelling of 684601375 in words is "six hundred eighty-four million, six hundred one thousand, three hundred seventy-five".