99226981 has 4 divisors (see below), whose sum is σ = 113402272. Its totient is φ = 85051692.

The previous prime is 99226979. The next prime is 99226999. The reversal of 99226981 is 18962299.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99226981 - 2¹ = 99226979 is a prime.

It is a super-2 number, since 2×99226981² = 19691987516748722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99226961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7087635 + ... + 7087648.

It is an arithmetic number, because the mean of its divisors is an integer number (28350568).

Almost surely, 2^99226981 is an apocalyptic number.

It is an amenable number.

99226981 is a deficient number, since it is larger than the sum of its proper divisors (14175291).

99226981 is a wasteful number, since it uses less digits than its factorization.

99226981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14175290.

The product of its digits is 139968, while the sum is 46.

The square root of 99226981 is about 9961.2740650983. The cubic root of 99226981 is about 462.9597761379.

The spelling of 99226981 in words is "ninety-nine million, two hundred twenty-six thousand, nine hundred eighty-one".