99399399 has 32 divisors (see below), whose sum is σ = 151939584. Its totient is φ = 57214080.

The previous prime is 99399397. The next prime is 99399401.

99399399 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (99399397) and next prime (99399401).

It is not a de Polignac number, because 99399399 - 2¹ = 99399397 is a prime.

It is a super-2 number, since 2×99399399² = 19760481043122402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99399397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130929 + ... + 131685.

It is an arithmetic number, because the mean of its divisors is an integer number (4748112).

Almost surely, 2^99399399 is an apocalyptic number.

99399399 is a deficient number, since it is larger than the sum of its proper divisors (52540185).

99399399 is a wasteful number, since it uses less digits than its factorization.

99399399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967.

The product of its digits is 4782969, while the sum is 60.

The square root of 99399399 is about 9969.9247238883. The cubic root of 99399399 is about 463.2277691404.

The spelling of 99399399 in words is "ninety-nine million, three hundred ninety-nine thousand, three hundred ninety-nine".