136438999 has 2 divisors, whose sum is σ = 136439000. Its totient is φ = 136438998.

The previous prime is 136438961. The next prime is 136439011. The reversal of 136438999 is 999834631.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136438999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136438909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68219499 + 68219500.

It is an arithmetic number, because the mean of its divisors is an integer number (68219500).

Almost surely, 2^136438999 is an apocalyptic number.

136438999 is a deficient number, since it is larger than the sum of its proper divisors (1).

136438999 is an equidigital number, since it uses as much as digits as its factorization.

136438999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 52.

The square root of 136438999 is about 11680.7105520169. The cubic root of 136438999 is about 514.8090522822.

The spelling of 136438999 in words is "one hundred thirty-six million, four hundred thirty-eight thousand, nine hundred ninety-nine".