136864669 has 2 divisors, whose sum is σ = 136864670. Its totient is φ = 136864668.

The previous prime is 136864643. The next prime is 136864681. The reversal of 136864669 is 966468631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125216100 + 11648569 = 11190^2 + 3413^2 .

It is a cyclic number.

It is not a de Polignac number, because 136864669 - 2¹⁹ = 136340381 is a prime.

It is a super-2 number, since 2×136864669² = 37463875240959122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136864639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68432334 + 68432335.

It is an arithmetic number, because the mean of its divisors is an integer number (68432335).

Almost surely, 2^136864669 is an apocalyptic number.

It is an amenable number.

136864669 is a deficient number, since it is larger than the sum of its proper divisors (1).

136864669 is an equidigital number, since it uses as much as digits as its factorization.

136864669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 49.

The square root of 136864669 is about 11698.9174285487. The cubic root of 136864669 is about 515.3438731455.

The spelling of 136864669 in words is "one hundred thirty-six million, eight hundred sixty-four thousand, six hundred sixty-nine".