136939478 has 8 divisors (see below), whose sum is σ = 221209968. Its totient is φ = 63202824.

The previous prime is 136939463. The next prime is 136939507. The reversal of 136939478 is 874939631.

136939478 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2633426 + ... + 2633477.

It is an arithmetic number, because the mean of its divisors is an integer number (27651246).

Almost surely, 2^136939478 is an apocalyptic number.

136939478 is a deficient number, since it is larger than the sum of its proper divisors (84270490).

136939478 is a wasteful number, since it uses less digits than its factorization.

136939478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5266918.

The product of its digits is 979776, while the sum is 50.

The square root of 136939478 is about 11702.1142534159. The cubic root of 136939478 is about 515.4377501558.

The spelling of 136939478 in words is "one hundred thirty-six million, nine hundred thirty-nine thousand, four hundred seventy-eight".