16972129 has 2 divisors, whose sum is σ = 16972130. Its totient is φ = 16972128.

The previous prime is 16972093. The next prime is 16972133. The reversal of 16972129 is 92127961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16851025 + 121104 = 4105^2 + 348^2 .

It is an emirp because it is prime and its reverse (92127961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16972129 - 2¹⁷ = 16841057 is a prime.

It is not a weakly prime, because it can be changed into another prime (16972139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8486064 + 8486065.

It is an arithmetic number, because the mean of its divisors is an integer number (8486065).

Almost surely, 2^16972129 is an apocalyptic number.

It is an amenable number.

16972129 is a deficient number, since it is larger than the sum of its proper divisors (1).

16972129 is an equidigital number, since it uses as much as digits as its factorization.

16972129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 37.

The square root of 16972129 is about 4119.7243839849. The cubic root of 16972129 is about 256.9875641860.

The spelling of 16972129 in words is "sixteen million, nine hundred seventy-two thousand, one hundred twenty-nine".