972816099 has 16 divisors (see below), whose sum is σ = 1336928160. Its totient is φ = 628750080.

The previous prime is 972816071. The next prime is 972816101. The reversal of 972816099 is 990618279.

It is a happy number.

It is a Cunningham number, because it is equal to 31190²-1.

It is not a de Polignac number, because 972816099 - 2¹² = 972812003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (972816029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15597 + ... + 46785.

It is an arithmetic number, because the mean of its divisors is an integer number (83558010).

Almost surely, 2^972816099 is an apocalyptic number.

972816099 is a deficient number, since it is larger than the sum of its proper divisors (364112061).

972816099 is a wasteful number, since it uses less digits than its factorization.

972816099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31510.

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 972816099 is about 31189.9999839692. Note that the first 4 decimals coincide. The cubic root of 972816099 is about 990.8553295772.

The spelling of 972816099 in words is "nine hundred seventy-two million, eight hundred sixteen thousand, ninety-nine".