999089427 has 32 divisors (see below), whose sum is σ = 1544015872. Its totient is φ = 562857984.

The previous prime is 999089423. The next prime is 999089437. The reversal of 999089427 is 724980999.

It is not a de Polignac number, because 999089427 - 2² = 999089423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (999089423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 636798 + ... + 638364.

It is an arithmetic number, because the mean of its divisors is an integer number (48250496).

Almost surely, 2^999089427 is an apocalyptic number.

999089427 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

999089427 is a deficient number, since it is larger than the sum of its proper divisors (544926445).

999089427 is a wasteful number, since it uses less digits than its factorization.

999089427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987.

The product of its (nonzero) digits is 2939328, while the sum is 57.

The square root of 999089427 is about 31608.3758994353. The cubic root of 999089427 is about 999.6963834930.

The spelling of 999089427 in words is "nine hundred ninety-nine million, eighty-nine thousand, four hundred twenty-seven".