136977506 has 4 divisors (see below), whose sum is σ = 205466262. Its totient is φ = 68488752.

The previous prime is 136977487. The next prime is 136977541. The reversal of 136977506 is 605779631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 96845281 + 40132225 = 9841^2 + 6335^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34244375 + ... + 34244378.

Almost surely, 2^136977506 is an apocalyptic number.

136977506 is a deficient number, since it is larger than the sum of its proper divisors (68488756).

136977506 is an equidigital number, since it uses as much as digits as its factorization.

136977506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68488755.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 136977506 is about 11703.7389752164. The cubic root of 136977506 is about 515.4854579776.

The spelling of 136977506 in words is "one hundred thirty-six million, nine hundred seventy-seven thousand, five hundred six".