99130639 has 4 divisors (see below), whose sum is σ = 99159480. Its totient is φ = 99101800.

The previous prime is 99130637. The next prime is 99130643. The reversal of 99130639 is 93603199.

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 99130639 - 2¹ = 99130637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99130637) 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, 8437 + ... + 16414.

It is an arithmetic number, because the mean of its divisors is an integer number (24789870).

Almost surely, 2^99130639 is an apocalyptic number.

99130639 is a deficient number, since it is larger than the sum of its proper divisors (28841).

99130639 is a wasteful number, since it uses less digits than its factorization.

99130639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28840.

The product of its (nonzero) digits is 39366, while the sum is 40.

The square root of 99130639 is about 9956.4370635283. The cubic root of 99130639 is about 462.8098944783.

The spelling of 99130639 in words is "ninety-nine million, one hundred thirty thousand, six hundred thirty-nine".