684198475 has 12 divisors (see below), whose sum is σ = 850163344. Its totient is φ = 546225120.

The previous prime is 684198469. The next prime is 684198547. The reversal of 684198475 is 574891486.

It is not a de Polignac number, because 684198475 - 2⁵ = 684198443 is a prime.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15924 + ... + 40273.

Almost surely, 2^684198475 is an apocalyptic number.

684198475 is a deficient number, since it is larger than the sum of its proper divisors (165964869).

684198475 is a wasteful number, since it uses less digits than its factorization.

684198475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56694 (or 56689 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 52.

The square root of 684198475 is about 26157.1878266759. The cubic root of 684198475 is about 881.1720243533.

The spelling of 684198475 in words is "six hundred eighty-four million, one hundred ninety-eight thousand, four hundred seventy-five".