164900399 has 4 divisors (see below), whose sum is σ = 168735336. Its totient is φ = 161065464.

The previous prime is 164900371. The next prime is 164900447. The reversal of 164900399 is 993009461.

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 164900399 - 2¹⁶ = 164834863 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 (164900369) 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, 1917404 + ... + 1917489.

It is an arithmetic number, because the mean of its divisors is an integer number (42183834).

Almost surely, 2^164900399 is an apocalyptic number.

164900399 is a deficient number, since it is larger than the sum of its proper divisors (3834937).

164900399 is an equidigital number, since it uses as much as digits as its factorization.

164900399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3834936.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 164900399 is about 12841.3550297467. The cubic root of 164900399 is about 548.3702709653.

The spelling of 164900399 in words is "one hundred sixty-four million, nine hundred thousand, three hundred ninety-nine".