999144915 has 8 divisors (see below), whose sum is σ = 1598631888. Its totient is φ = 532877280.

The previous prime is 999144901. The next prime is 999144919. The reversal of 999144915 is 519441999.

It is a happy number.

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

It is not a de Polignac number, because 999144915 - 2¹⁰ = 999143891 is a prime.

It is a super-2 number, since 2×999144915² = 1996581122340714450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (999144919) 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, 33304816 + ... + 33304845.

It is an arithmetic number, because the mean of its divisors is an integer number (199828986).

Almost surely, 2^999144915 is an apocalyptic number.

999144915 is a deficient number, since it is larger than the sum of its proper divisors (599486973).

999144915 is a wasteful number, since it uses less digits than its factorization.

999144915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66609669.

The product of its digits is 524880, while the sum is 51.

The square root of 999144915 is about 31609.2536292776. The cubic root of 999144915 is about 999.7148903869.

The spelling of 999144915 in words is "nine hundred ninety-nine million, one hundred forty-four thousand, nine hundred fifteen".