136739489 has 2 divisors, whose sum is σ = 136739490. Its totient is φ = 136739488.

The previous prime is 136739479. The next prime is 136739507. The reversal of 136739489 is 984937631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77141089 + 59598400 = 8783^2 + 7720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136739489 is a prime.

It is a super-2 number, since 2×136739489² = 37395375703962242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (136739459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68369744 + 68369745.

It is an arithmetic number, because the mean of its divisors is an integer number (68369745).

Almost surely, 2^136739489 is an apocalyptic number.

It is an amenable number.

136739489 is a deficient number, since it is larger than the sum of its proper divisors (1).

136739489 is an equidigital number, since it uses as much as digits as its factorization.

136739489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 50.

The square root of 136739489 is about 11693.5661369832. The cubic root of 136739489 is about 515.1867095662.

The spelling of 136739489 in words is "one hundred thirty-six million, seven hundred thirty-nine thousand, four hundred eighty-nine".