136937861 has 2 divisors, whose sum is σ = 136937862. Its totient is φ = 136937860.

The previous prime is 136937821. The next prime is 136937869. The reversal of 136937861 is 168739631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136773025 + 164836 = 11695^2 + 406^2 .

It is a cyclic number.

It is not a de Polignac number, because 136937861 - 2¹⁰ = 136936837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136937869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68468930 + 68468931.

It is an arithmetic number, because the mean of its divisors is an integer number (68468931).

Almost surely, 2^136937861 is an apocalyptic number.

It is an amenable number.

136937861 is a deficient number, since it is larger than the sum of its proper divisors (1).

136937861 is an equidigital number, since it uses as much as digits as its factorization.

136937861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 136937861 is about 11702.0451631328. The cubic root of 136937861 is about 515.4357213614.

The spelling of 136937861 in words is "one hundred thirty-six million, nine hundred thirty-seven thousand, eight hundred sixty-one".