136879421 has 8 divisors (see below), whose sum is σ = 156565824. Its totient is φ = 117226080.

The previous prime is 136879403. The next prime is 136879433. The reversal of 136879421 is 124978631.

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

It is a cyclic number.

It is not a de Polignac number, because 136879421 - 2⁶ = 136879357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136879441) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1361 + ... + 16601.

It is an arithmetic number, because the mean of its divisors is an integer number (19570728).

Almost surely, 2^136879421 is an apocalyptic number.

It is an amenable number.

136879421 is a deficient number, since it is larger than the sum of its proper divisors (19686403).

136879421 is a wasteful number, since it uses less digits than its factorization.

136879421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16531.

The product of its digits is 72576, while the sum is 41.

The square root of 136879421 is about 11699.5478972480. The cubic root of 136879421 is about 515.3623879790.

The spelling of 136879421 in words is "one hundred thirty-six million, eight hundred seventy-nine thousand, four hundred twenty-one".