136564489 has 2 divisors, whose sum is σ = 136564490. Its totient is φ = 136564488.

The previous prime is 136564471. The next prime is 136564499. The reversal of 136564489 is 984465631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129846025 + 6718464 = 11395^2 + 2592^2 .

It is a cyclic number.

It is not a de Polignac number, because 136564489 - 2¹³ = 136556297 is a prime.

It is a super-2 number, since 2×136564489² = 37299719311662242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (136564459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68282244 + 68282245.

It is an arithmetic number, because the mean of its divisors is an integer number (68282245).

Almost surely, 2^136564489 is an apocalyptic number.

It is an amenable number.

136564489 is a deficient number, since it is larger than the sum of its proper divisors (1).

136564489 is an equidigital number, since it uses as much as digits as its factorization.

136564489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 46.

The square root of 136564489 is about 11686.0809940715. The cubic root of 136564489 is about 514.9668360835.

It can be divided in two parts, 13656 and 4489, that added together give a triangular number (18145 = T₁₉₀).

The spelling of 136564489 in words is "one hundred thirty-six million, five hundred sixty-four thousand, four hundred eighty-nine".