136984478 has 4 divisors (see below), whose sum is σ = 205476720. Its totient is φ = 68492238.

The previous prime is 136984469. The next prime is 136984493. The reversal of 136984478 is 874489631.

136984478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874489631 = 79 ⋅11069489.

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, 34246118 + ... + 34246121.

It is an arithmetic number, because the mean of its divisors is an integer number (51369180).

Almost surely, 2^136984478 is an apocalyptic number.

136984478 is a deficient number, since it is larger than the sum of its proper divisors (68492242).

136984478 is an equidigital number, since it uses as much as digits as its factorization.

136984478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68492241.

The product of its digits is 1161216, while the sum is 50.

The square root of 136984478 is about 11704.0368249592. The cubic root of 136984478 is about 515.4942037046.

The spelling of 136984478 in words is "one hundred thirty-six million, nine hundred eighty-four thousand, four hundred seventy-eight".