999172130 has 16 divisors (see below), whose sum is σ = 1962010944. Its totient is φ = 363335280.

The previous prime is 999172081. The next prime is 999172169. The reversal of 999172130 is 31271999.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4541582 + ... + 4541801.

It is an arithmetic number, because the mean of its divisors is an integer number (122625684).

Almost surely, 2^999172130 is an apocalyptic number.

999172130 is a deficient number, since it is larger than the sum of its proper divisors (962838814).

999172130 is a wasteful number, since it uses less digits than its factorization.

999172130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9083401.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 999172130 is about 31609.6841173714. The cubic root of 999172130 is about 999.7239671462.

The spelling of 999172130 in words is "nine hundred ninety-nine million, one hundred seventy-two thousand, one hundred thirty".