18613129 has 2 divisors, whose sum is σ = 18613130. Its totient is φ = 18613128.

The previous prime is 18613117. The next prime is 18613163. The reversal of 18613129 is 92131681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13860729 + 4752400 = 3723^2 + 2180^2 .

It is a cyclic number.

It is not a de Polignac number, because 18613129 - 2⁵ = 18613097 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18613129.

It is not a weakly prime, because it can be changed into another prime (18613169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9306564 + 9306565.

It is an arithmetic number, because the mean of its divisors is an integer number (9306565).

Almost surely, 2^18613129 is an apocalyptic number.

It is an amenable number.

18613129 is a deficient number, since it is larger than the sum of its proper divisors (1).

18613129 is an equidigital number, since it uses as much as digits as its factorization.

18613129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 31.

The square root of 18613129 is about 4314.2935690562. The cubic root of 18613129 is about 265.0166312097.

The spelling of 18613129 in words is "eighteen million, six hundred thirteen thousand, one hundred twenty-nine".