236138939 has 2 divisors, whose sum is σ = 236138940. Its totient is φ = 236138938.

The previous prime is 236138923. The next prime is 236138957. The reversal of 236138939 is 939831632.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 236138939 - 2⁴ = 236138923 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 236138939.

It is not a weakly prime, because it can be changed into another prime (236138989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118069469 + 118069470.

It is an arithmetic number, because the mean of its divisors is an integer number (118069470).

Almost surely, 2^236138939 is an apocalyptic number.

236138939 is a deficient number, since it is larger than the sum of its proper divisors (1).

236138939 is an equidigital number, since it uses as much as digits as its factorization.

236138939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 44.

The square root of 236138939 is about 15366.8129096440. The cubic root of 236138939 is about 618.0959090858.

The spelling of 236138939 in words is "two hundred thirty-six million, one hundred thirty-eight thousand, nine hundred thirty-nine".