16172969 has 2 divisors, whose sum is σ = 16172970. Its totient is φ = 16172968.

The previous prime is 16172963. The next prime is 16172993. The reversal of 16172969 is 96927161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8265625 + 7907344 = 2875^2 + 2812^2 .

It is a cyclic number.

It is not a de Polignac number, because 16172969 - 2⁴ = 16172953 is a prime.

It is a super-2 number, since 2×16172969² = 523129852549922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16172963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8086484 + 8086485.

It is an arithmetic number, because the mean of its divisors is an integer number (8086485).

Almost surely, 2^16172969 is an apocalyptic number.

It is an amenable number.

16172969 is a deficient number, since it is larger than the sum of its proper divisors (1).

16172969 is an equidigital number, since it uses as much as digits as its factorization.

16172969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 41.

The square root of 16172969 is about 4021.5630046041. The cubic root of 16172969 is about 252.8889877343. Note that the first 3 decimals are identical.

The spelling of 16172969 in words is "sixteen million, one hundred seventy-two thousand, nine hundred sixty-nine".