136839457 has 4 divisors (see below), whose sum is σ = 136935216. Its totient is φ = 136743700.

The previous prime is 136839433. The next prime is 136839503. The reversal of 136839457 is 754938631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136839457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136839257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45703 + ... + 48604.

It is an arithmetic number, because the mean of its divisors is an integer number (34233804).

Almost surely, 2^136839457 is an apocalyptic number.

It is an amenable number.

136839457 is a deficient number, since it is larger than the sum of its proper divisors (95759).

136839457 is an equidigital number, since it uses as much as digits as its factorization.

136839457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95758.

The product of its digits is 544320, while the sum is 46.

The square root of 136839457 is about 11697.8398433215. The cubic root of 136839457 is about 515.3122271706.

The spelling of 136839457 in words is "one hundred thirty-six million, eight hundred thirty-nine thousand, four hundred fifty-seven".