16164409 has 2 divisors, whose sum is σ = 16164410. Its totient is φ = 16164408.

The previous prime is 16164403. The next prime is 16164457. The reversal of 16164409 is 90446161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8982009 + 7182400 = 2997^2 + 2680^2 .

It is a cyclic number.

It is not a de Polignac number, because 16164409 - 2⁹ = 16163897 is a prime.

It is a super-2 number, since 2×16164409² = 522576236638562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16164403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8082204 + 8082205.

It is an arithmetic number, because the mean of its divisors is an integer number (8082205).

Almost surely, 2^16164409 is an apocalyptic number.

It is an amenable number.

16164409 is a deficient number, since it is larger than the sum of its proper divisors (1).

16164409 is an equidigital number, since it uses as much as digits as its factorization.

16164409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 16164409 is about 4020.4986009200. The cubic root of 16164409 is about 252.8443636507.

The spelling of 16164409 in words is "sixteen million, one hundred sixty-four thousand, four hundred nine".