16164399 has 16 divisors (see below), whose sum is σ = 22982400. Its totient is φ = 10070400.

The previous prime is 16164389. The next prime is 16164403. The reversal of 16164399 is 99346161.

It is not a de Polignac number, because 16164399 - 2⁵ = 16164367 is a prime.

It is a super-2 number, since 2×16164399² = 522575590062402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16164319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6652 + ... + 8750.

It is an arithmetic number, because the mean of its divisors is an integer number (1436400).

Almost surely, 2^16164399 is an apocalyptic number.

16164399 is a deficient number, since it is larger than the sum of its proper divisors (6818001).

16164399 is a wasteful number, since it uses less digits than its factorization.

16164399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270.

The product of its digits is 34992, while the sum is 39.

The square root of 16164399 is about 4020.4973572930. The cubic root of 16164399 is about 252.8443115106.

It can be divided in two parts, 16164 and 399, that multiplied together give a triangular number (6449436 = T₃₅₉₁).

The spelling of 16164399 in words is "sixteen million, one hundred sixty-four thousand, three hundred ninety-nine".