99390407 has 4 divisors (see below), whose sum is σ = 99468336. Its totient is φ = 99312480.

The previous prime is 99390377. The next prime is 99390409. The reversal of 99390407 is 70409399.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70409399 = 499 ⋅141101.

It is a cyclic number.

It is not a de Polignac number, because 99390407 - 2¹² = 99386311 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 (99390409) 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, 37019 + ... + 39612.

It is an arithmetic number, because the mean of its divisors is an integer number (24867084).

Almost surely, 2^99390407 is an apocalyptic number.

99390407 is a deficient number, since it is larger than the sum of its proper divisors (77929).

99390407 is a wasteful number, since it uses less digits than its factorization.

99390407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77928.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 99390407 is about 9969.4737574257. The cubic root of 99390407 is about 463.2138003446.

The spelling of 99390407 in words is "ninety-nine million, three hundred ninety thousand, four hundred seven".