136742686 has 4 divisors (see below), whose sum is σ = 205114032. Its totient is φ = 68371342.

The previous prime is 136742633. The next prime is 136742719. The reversal of 136742686 is 686247631.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34185670 + ... + 34185673.

It is an arithmetic number, because the mean of its divisors is an integer number (51278508).

Almost surely, 2^136742686 is an apocalyptic number.

136742686 is a deficient number, since it is larger than the sum of its proper divisors (68371346).

136742686 is an equidigital number, since it uses as much as digits as its factorization.

136742686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68371345.

The product of its digits is 290304, while the sum is 43.

The square root of 136742686 is about 11693.7028352870. The cubic root of 136742686 is about 515.1907245953.

The spelling of 136742686 in words is "one hundred thirty-six million, seven hundred forty-two thousand, six hundred eighty-six".