999730999 has 8 divisors (see below), whose sum is σ = 1052656640. Its totient is φ = 946836216.

The previous prime is 999730981. The next prime is 999731011. The reversal of 999730999 is 999037999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 999730999 - 2⁵ = 999730967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 999730999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999760999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91882 + ... + 102184.

It is an arithmetic number, because the mean of its divisors is an integer number (131582080).

Almost surely, 2^999730999 is an apocalyptic number.

999730999 is a deficient number, since it is larger than the sum of its proper divisors (52925641).

999730999 is a wasteful number, since it uses less digits than its factorization.

999730999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15429.

The product of its (nonzero) digits is 11160261, while the sum is 64.

The square root of 999730999 is about 31618.5230363469. The cubic root of 999730999 is about 999.9103249586.

The spelling of 999730999 in words is "nine hundred ninety-nine million, seven hundred thirty thousand, nine hundred ninety-nine".