684397105 has 16 divisors (see below), whose sum is σ = 939394944. Its totient is φ = 468904320.

The previous prime is 684397099. The next prime is 684397117. The reversal of 684397105 is 501793486.

It is not a de Polignac number, because 684397105 - 2³ = 684397097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37285 + ... + 52525.

It is an arithmetic number, because the mean of its divisors is an integer number (58712184).

Almost surely, 2^684397105 is an apocalyptic number.

It is an amenable number.

684397105 is a deficient number, since it is larger than the sum of its proper divisors (254997839).

684397105 is a wasteful number, since it uses less digits than its factorization.

684397105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16536.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 684397105 is about 26160.9844042612. The cubic root of 684397105 is about 881.2572872660.

The spelling of 684397105 in words is "six hundred eighty-four million, three hundred ninety-seven thousand, one hundred five".