99522639 has 12 divisors (see below), whose sum is σ = 143872872. Its totient is φ = 66294000.

The previous prime is 99522629. The next prime is 99522649. The reversal of 99522639 is 93622599.

99522639 is a `hidden beast` number, since 9 + 9 + 5 + 2 + 2 + 639 = 666.

It is an interprime number because it is at equal distance from previous prime (99522629) and next prime (99522649).

It is not a de Polignac number, because 99522639 - 2⁴ = 99522623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99522594 and 99522603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99522629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9249 + ... + 16869.

It is an arithmetic number, because the mean of its divisors is an integer number (11989406).

Almost surely, 2^99522639 is an apocalyptic number.

99522639 is a deficient number, since it is larger than the sum of its proper divisors (44350233).

99522639 is a wasteful number, since it uses less digits than its factorization.

99522639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9078 (or 9075 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 99522639 is about 9976.1033976197. The cubic root of 99522639 is about 463.4191338553.

The spelling of 99522639 in words is "ninety-nine million, five hundred twenty-two thousand, six hundred thirty-nine".