136979424 has 120 divisors (see below), whose sum is σ = 412556760. Its totient is φ = 44561664.

The previous prime is 136979411. The next prime is 136979429. The reversal of 136979424 is 424979631.

It is a happy number.

136979424 is a `hidden beast` number, since 136 + 97 + 9 + 424 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 136979424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136979429) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 110842 + ... + 112070.

It is an arithmetic number, because the mean of its divisors is an integer number (3437973).

Almost surely, 2^136979424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136979424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206278380).

136979424 is an abundant number, since it is smaller than the sum of its proper divisors (275577336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136979424 is a wasteful number, since it uses less digits than its factorization.

136979424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294 (or 1277 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 136979424 is about 11703.8209145561. The cubic root of 136979424 is about 515.4878639602.

The spelling of 136979424 in words is "one hundred thirty-six million, nine hundred seventy-nine thousand, four hundred twenty-four".