136557649 has 2 divisors, whose sum is σ = 136557650. Its totient is φ = 136557648.

The previous prime is 136557613. The next prime is 136557653. The reversal of 136557649 is 946755631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133818624 + 2739025 = 11568^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 136557649 - 2¹⁹ = 136033361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136557599 and 136557608.

It is not a weakly prime, because it can be changed into another prime (136557689) 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, 68278824 + 68278825.

It is an arithmetic number, because the mean of its divisors is an integer number (68278825).

Almost surely, 2^136557649 is an apocalyptic number.

It is an amenable number.

136557649 is a deficient number, since it is larger than the sum of its proper divisors (1).

136557649 is an equidigital number, since it uses as much as digits as its factorization.

136557649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 46.

The square root of 136557649 is about 11685.7883345541. The cubic root of 136557649 is about 514.9582383580.

The spelling of 136557649 in words is "one hundred thirty-six million, five hundred fifty-seven thousand, six hundred forty-nine".