136977505 has 16 divisors (see below), whose sum is σ = 191854080. Its totient is φ = 91927872.

The previous prime is 136977487. The next prime is 136977541. The reversal of 136977505 is 505779631.

It is a cyclic number.

It is not a de Polignac number, because 136977505 - 2¹¹ = 136975457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39990 + ... + 43279.

It is an arithmetic number, because the mean of its divisors is an integer number (11990880).

Almost surely, 2^136977505 is an apocalyptic number.

It is an amenable number.

136977505 is a deficient number, since it is larger than the sum of its proper divisors (54876575).

136977505 is an equidigital number, since it uses as much as digits as its factorization.

136977505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83328.

The product of its (nonzero) digits is 198450, while the sum is 43.

The square root of 136977505 is about 11703.7389324950. The cubic root of 136977505 is about 515.4854567231.

The spelling of 136977505 in words is "one hundred thirty-six million, nine hundred seventy-seven thousand, five hundred five".