999613404 has 36 divisors (see below), whose sum is σ = 2528528184. Its totient is φ = 332976672.

The previous prime is 999613399. The next prime is 999613411. The reversal of 999613404 is 404316999.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 999613404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48799 + ... + 66185.

It is an arithmetic number, because the mean of its divisors is an integer number (70236894).

Almost surely, 2^999613404 is an apocalyptic number.

It is an amenable number.

999613404 is an abundant number, since it is smaller than the sum of its proper divisors (1528914780).

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

999613404 is a wasteful number, since it uses less digits than its factorization.

999613404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18994 (or 18989 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 999613404 is about 31616.6633913195. The cubic root of 999613404 is about 999.8711180568.

The spelling of 999613404 in words is "nine hundred ninety-nine million, six hundred thirteen thousand, four hundred four".