136740893 has 2 divisors, whose sum is σ = 136740894. Its totient is φ = 136740892.

The previous prime is 136740859. The next prime is 136740917. The reversal of 136740893 is 398047631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133217764 + 3523129 = 11542^2 + 1877^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136740893 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136740893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136740823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68370446 + 68370447.

It is an arithmetic number, because the mean of its divisors is an integer number (68370447).

Almost surely, 2^136740893 is an apocalyptic number.

It is an amenable number.

136740893 is a deficient number, since it is larger than the sum of its proper divisors (1).

136740893 is an equidigital number, since it uses as much as digits as its factorization.

136740893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 136740893 is about 11693.6261698414. The cubic root of 136740893 is about 515.1884728209.

The spelling of 136740893 in words is "one hundred thirty-six million, seven hundred forty thousand, eight hundred ninety-three".