136620877 has 2 divisors, whose sum is σ = 136620878. Its totient is φ = 136620876.

The previous prime is 136620829. The next prime is 136620881. The reversal of 136620877 is 778026631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102292996 + 34327881 = 10114^2 + 5859^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136620877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196620877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68310438 + 68310439.

It is an arithmetic number, because the mean of its divisors is an integer number (68310439).

Almost surely, 2^136620877 is an apocalyptic number.

It is an amenable number.

136620877 is a deficient number, since it is larger than the sum of its proper divisors (1).

136620877 is an equidigital number, since it uses as much as digits as its factorization.

136620877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 136620877 is about 11688.4933588551. The cubic root of 136620877 is about 515.0377035896.

The spelling of 136620877 in words is "one hundred thirty-six million, six hundred twenty thousand, eight hundred seventy-seven".