99620239 has 4 divisors (see below), whose sum is σ = 100606680. Its totient is φ = 98633800.

The previous prime is 99620237. The next prime is 99620263. The reversal of 99620239 is 93202699.

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 99620239 - 2¹ = 99620237 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99620237) 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, 493069 + ... + 493270.

It is an arithmetic number, because the mean of its divisors is an integer number (25151670).

Almost surely, 2^99620239 is an apocalyptic number.

99620239 is a deficient number, since it is larger than the sum of its proper divisors (986441).

99620239 is a wasteful number, since it uses less digits than its factorization.

99620239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986440.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 99620239 is about 9980.9938883861. The cubic root of 99620239 is about 463.5705732017.

The spelling of 99620239 in words is "ninety-nine million, six hundred twenty thousand, two hundred thirty-nine".