16372399 has 4 divisors (see below), whose sum is σ = 16430536. Its totient is φ = 16314264.

The previous prime is 16372381. The next prime is 16372409. The reversal of 16372399 is 99327361.

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 16372399 - 2⁷ = 16372271 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 (16372199) 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, 28644 + ... + 29209.

It is an arithmetic number, because the mean of its divisors is an integer number (4107634).

Almost surely, 2^16372399 is an apocalyptic number.

16372399 is a deficient number, since it is larger than the sum of its proper divisors (58137).

16372399 is an equidigital number, since it uses as much as digits as its factorization.

16372399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58136.

The product of its digits is 61236, while the sum is 40.

The square root of 16372399 is about 4046.2821206634. The cubic root of 16372399 is about 253.9242080682.

The spelling of 16372399 in words is "sixteen million, three hundred seventy-two thousand, three hundred ninety-nine".