99072163 has 4 divisors (see below), whose sum is σ = 100550920. Its totient is φ = 97593408.

The previous prime is 99072139. The next prime is 99072167. The reversal of 99072163 is 36127099.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99072163 - 2¹⁷ = 98941091 is a prime.

It is the 9954-th Hogben number.

It is not an unprimeable number, because it can be changed into a prime (99072167) by changing a digit.

It is a nontrivial repunit in base 9953.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739278 + ... + 739411.

It is an arithmetic number, because the mean of its divisors is an integer number (25137730).

Almost surely, 2^99072163 is an apocalyptic number.

99072163 is a deficient number, since it is larger than the sum of its proper divisors (1478757).

99072163 is a wasteful number, since it uses less digits than its factorization.

99072163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478756.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 99072163 is about 9953.5000376752. The cubic root of 99072163 is about 462.7188745379.

It can be divided in two parts, 99072 and 163, that added together give a triangular number (99235 = T₄₄₅).

The spelling of 99072163 in words is "ninety-nine million, seventy-two thousand, one hundred sixty-three".