691040104 has 16 divisors (see below), whose sum is σ = 1300745700. Its totient is φ = 344174592.

The previous prime is 691040099. The next prime is 691040111. The reversal of 691040104 is 401040196.

It can be written as a sum of positive squares in 2 ways, for example, as 441084004 + 249956100 = 21002^2 + 15810^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165999 + ... + 170110.

Almost surely, 2^691040104 is an apocalyptic number.

It is an amenable number.

691040104 is a deficient number, since it is larger than the sum of its proper divisors (609705596).

691040104 is a wasteful number, since it uses less digits than its factorization.

691040104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336372 (or 336368 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 691040104 is about 26287.6416591523. The cubic root of 691040104 is about 884.0993759550.

The spelling of 691040104 in words is "six hundred ninety-one million, forty thousand, one hundred four".