136393489 has 2 divisors, whose sum is σ = 136393490. Its totient is φ = 136393488.

The previous prime is 136393471. The next prime is 136393561. The reversal of 136393489 is 984393631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116812864 + 19580625 = 10808^2 + 4425^2 .

It is a cyclic number.

It is not a de Polignac number, because 136393489 - 2¹¹ = 136391441 is a prime.

It is not a weakly prime, because it can be changed into another prime (136393469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68196744 + 68196745.

It is an arithmetic number, because the mean of its divisors is an integer number (68196745).

Almost surely, 2^136393489 is an apocalyptic number.

It is an amenable number.

136393489 is a deficient number, since it is larger than the sum of its proper divisors (1).

136393489 is an equidigital number, since it uses as much as digits as its factorization.

136393489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 46.

The square root of 136393489 is about 11678.7623059980. The cubic root of 136393489 is about 514.7518067596.

The spelling of 136393489 in words is "one hundred thirty-six million, three hundred ninety-three thousand, four hundred eighty-nine".