136402477 has 2 divisors, whose sum is σ = 136402478. Its totient is φ = 136402476.

The previous prime is 136402447. The next prime is 136402499. The reversal of 136402477 is 774204631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125865961 + 10536516 = 11219^2 + 3246^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136402477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136402417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68201238 + 68201239.

It is an arithmetic number, because the mean of its divisors is an integer number (68201239).

Almost surely, 2^136402477 is an apocalyptic number.

It is an amenable number.

136402477 is a deficient number, since it is larger than the sum of its proper divisors (1).

136402477 is an equidigital number, since it uses as much as digits as its factorization.

136402477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 136402477 is about 11679.1471007090. The cubic root of 136402477 is about 514.7631134763.

The spelling of 136402477 in words is "one hundred thirty-six million, four hundred two thousand, four hundred seventy-seven".