999961432 has 16 divisors (see below), whose sum is σ = 1956446640. Its totient is φ = 478242336.

The previous prime is 999961429. The next prime is 999961433. The reversal of 999961432 is 234169999.

It is a self number, because there is not a number n which added to its sum of digits gives 999961432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999961433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2717103 + ... + 2717470.

It is an arithmetic number, because the mean of its divisors is an integer number (122277915).

Almost surely, 2^999961432 is an apocalyptic number.

999961432 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

999961432 is a deficient number, since it is larger than the sum of its proper divisors (956485208).

999961432 is a wasteful number, since it uses less digits than its factorization.

999961432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5434602 (or 5434598 counting only the distinct ones).

The product of its digits is 944784, while the sum is 52.

The square root of 999961432 is about 31622.1667821799. The cubic root of 999961432 is about 999.9871438347.

The spelling of 999961432 in words is "nine hundred ninety-nine million, nine hundred sixty-one thousand, four hundred thirty-two".