99156961 has 4 divisors (see below), whose sum is σ = 99788692. Its totient is φ = 98525232.

The previous prime is 99156919. The next prime is 99157001. The reversal of 99156961 is 16965199.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42003361 + 57153600 = 6481^2 + 7560^2 .

It is a cyclic number.

It is not a de Polignac number, because 99156961 - 2¹⁹ = 98632673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99156061) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 315630 + ... + 315943.

It is an arithmetic number, because the mean of its divisors is an integer number (24947173).

Almost surely, 2^99156961 is an apocalyptic number.

It is an amenable number.

99156961 is a deficient number, since it is larger than the sum of its proper divisors (631731).

99156961 is a wasteful number, since it uses less digits than its factorization.

99156961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631730.

The product of its digits is 131220, while the sum is 46.

The square root of 99156961 is about 9957.7588341956. The cubic root of 99156961 is about 462.8508539102.

The spelling of 99156961 in words is "ninety-nine million, one hundred fifty-six thousand, nine hundred sixty-one".