999621492 has 48 divisors (see below), whose sum is σ = 2493251712. Its totient is φ = 310942720.

The previous prime is 999621479. The next prime is 999621509. The reversal of 999621492 is 294126999.

999621492 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent 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, 32853 + ... + 55484.

It is an arithmetic number, because the mean of its divisors is an integer number (51942744).

Almost surely, 2^999621492 is an apocalyptic number.

999621492 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

999621492 is an abundant number, since it is smaller than the sum of its proper divisors (1493630220).

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

999621492 is a wasteful number, since it uses less digits than its factorization.

999621492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88408 (or 88406 counting only the distinct ones).

The product of its digits is 629856, while the sum is 51.

The square root of 999621492 is about 31616.7912982959. The cubic root of 999621492 is about 999.8738147446.

The spelling of 999621492 in words is "nine hundred ninety-nine million, six hundred twenty-one thousand, four hundred ninety-two".