136828391 has 8 divisors (see below), whose sum is σ = 156457344. Its totient is φ = 117219960.

The previous prime is 136828387. The next prime is 136828397. The reversal of 136828391 is 193828631.

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 136828391 - 2² = 136828387 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 (136828397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13856 + ... + 21578.

It is an arithmetic number, because the mean of its divisors is an integer number (19557168).

Almost surely, 2^136828391 is an apocalyptic number.

136828391 is a deficient number, since it is larger than the sum of its proper divisors (19628953).

136828391 is an equidigital number, since it uses as much as digits as its factorization.

136828391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10261.

The product of its digits is 62208, while the sum is 41.

The square root of 136828391 is about 11697.3668404475. The cubic root of 136828391 is about 515.2983359559.

The spelling of 136828391 in words is "one hundred thirty-six million, eight hundred twenty-eight thousand, three hundred ninety-one".