136782517 has 2 divisors, whose sum is σ = 136782518. Its totient is φ = 136782516.

The previous prime is 136782511. The next prime is 136782521. The reversal of 136782517 is 715287631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115906756 + 20875761 = 10766^2 + 4569^2 .

It is a cyclic number.

It is not a de Polignac number, because 136782517 - 2⁷ = 136782389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136782517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136782511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68391258 + 68391259.

It is an arithmetic number, because the mean of its divisors is an integer number (68391259).

Almost surely, 2^136782517 is an apocalyptic number.

It is an amenable number.

136782517 is a deficient number, since it is larger than the sum of its proper divisors (1).

136782517 is an equidigital number, since it uses as much as digits as its factorization.

136782517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 40.

The square root of 136782517 is about 11695.4058074100. The cubic root of 136782517 is about 515.2407420654.

The spelling of 136782517 in words is "one hundred thirty-six million, seven hundred eighty-two thousand, five hundred seventeen".