136810977 has 4 divisors (see below), whose sum is σ = 182414640. Its totient is φ = 91207316.

The previous prime is 136810957. The next prime is 136810981. The reversal of 136810977 is 779018631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 779018631 = 3 ⋅259672877.

It is a cyclic number.

It is not a de Polignac number, because 136810977 - 2⁶ = 136810913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136810957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22801827 + ... + 22801832.

It is an arithmetic number, because the mean of its divisors is an integer number (45603660).

Almost surely, 2^136810977 is an apocalyptic number.

It is an amenable number.

136810977 is a deficient number, since it is larger than the sum of its proper divisors (45603663).

136810977 is an equidigital number, since it uses as much as digits as its factorization.

136810977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45603662.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 136810977 is about 11696.6224612065. The cubic root of 136810977 is about 515.2764745429.

The spelling of 136810977 in words is "one hundred thirty-six million, eight hundred ten thousand, nine hundred seventy-seven".