999116604 has 18 divisors (see below), whose sum is σ = 2525544840. Its totient is φ = 333038856.

The previous prime is 999116597. The next prime is 999116611. The reversal of 999116604 is 406611999.

It is an interprime number because it is at equal distance from previous prime (999116597) and next prime (999116611).

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 999116604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13876584 + ... + 13876655.

Almost surely, 2^999116604 is an apocalyptic number.

It is an amenable number.

999116604 is an abundant number, since it is smaller than the sum of its proper divisors (1526428236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999116604 is a wasteful number, since it uses less digits than its factorization.

999116604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27753249 (or 27753244 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 999116604 is about 31608.8057983847. The cubic root of 999116604 is about 999.7054479143.

The spelling of 999116604 in words is "nine hundred ninety-nine million, one hundred sixteen thousand, six hundred four".