999932401 has 16 divisors (see below), whose sum is σ = 1141475328. Its totient is φ = 867744000.

The previous prime is 999932389. The next prime is 999932447. The reversal of 999932401 is 104239999.

It is a cyclic number.

It is not a de Polignac number, because 999932401 - 2⁵ = 999932369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999932471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252406 + ... + 256336.

It is an arithmetic number, because the mean of its divisors is an integer number (71342208).

Almost surely, 2^999932401 is an apocalyptic number.

It is an amenable number.

999932401 is a deficient number, since it is larger than the sum of its proper divisors (141542927).

999932401 is a wasteful number, since it uses less digits than its factorization.

999932401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 999932401 is about 31621.7077495824. The cubic root of 999932401 is about 999.9774664922.

The spelling of 999932401 in words is "nine hundred ninety-nine million, nine hundred thirty-two thousand, four hundred one".