136363391 has 4 divisors (see below), whose sum is σ = 136678752. Its totient is φ = 136048032.

The previous prime is 136363387. The next prime is 136363393. The reversal of 136363391 is 193363631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193363631 = 773 ⋅250147.

It is a cyclic number.

It is not a de Polignac number, because 136363391 - 2² = 136363387 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 (136363393) 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, 157031 + ... + 157896.

It is an arithmetic number, because the mean of its divisors is an integer number (34169688).

Almost surely, 2^136363391 is an apocalyptic number.

136363391 is a deficient number, since it is larger than the sum of its proper divisors (315361).

136363391 is an equidigital number, since it uses as much as digits as its factorization.

136363391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315360.

The product of its digits is 26244, while the sum is 35.

The square root of 136363391 is about 11677.4736565749. The cubic root of 136363391 is about 514.7139404857.

The spelling of 136363391 in words is "one hundred thirty-six million, three hundred sixty-three thousand, three hundred ninety-one".