18116129 has 2 divisors, whose sum is σ = 18116130. Its totient is φ = 18116128.

The previous prime is 18116107. The next prime is 18116149. The reversal of 18116129 is 92161181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10387729 + 7728400 = 3223^2 + 2780^2 .

It is a cyclic number.

It is not a de Polignac number, because 18116129 - 2²⁰ = 17067553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18116149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9058064 + 9058065.

It is an arithmetic number, because the mean of its divisors is an integer number (9058065).

Almost surely, 2^18116129 is an apocalyptic number.

It is an amenable number.

18116129 is a deficient number, since it is larger than the sum of its proper divisors (1).

18116129 is an equidigital number, since it uses as much as digits as its factorization.

18116129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 29.

The square root of 18116129 is about 4256.3046178581. The cubic root of 18116129 is about 262.6365318468.

The spelling of 18116129 in words is "eighteen million, one hundred sixteen thousand, one hundred twenty-nine".