136328939 has 2 divisors, whose sum is σ = 136328940. Its totient is φ = 136328938.

The previous prime is 136328923. The next prime is 136328993. The reversal of 136328939 is 939823631.

Together with next prime (136328993) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136328939 - 2⁴ = 136328923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136328939.

It is not a weakly prime, because it can be changed into another prime (136328039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68164469 + 68164470.

It is an arithmetic number, because the mean of its divisors is an integer number (68164470).

Almost surely, 2^136328939 is an apocalyptic number.

136328939 is a deficient number, since it is larger than the sum of its proper divisors (1).

136328939 is an equidigital number, since it uses as much as digits as its factorization.

136328939 is an evil number, because the sum of its binary digits is even.

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

The square root of 136328939 is about 11675.9984155532. The cubic root of 136328939 is about 514.6705896075.

The spelling of 136328939 in words is "one hundred thirty-six million, three hundred twenty-eight thousand, nine hundred thirty-nine".