136253393 has 4 divisors (see below), whose sum is σ = 137784420. Its totient is φ = 134722368.

The previous prime is 136253387. The next prime is 136253417. The reversal of 136253393 is 393352631.

136253393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 393352631 = 7 ⋅56193233.

It can be written as a sum of positive squares in 2 ways, for example, as 78978769 + 57274624 = 8887^2 + 7568^2 .

It is a cyclic number.

It is not a de Polignac number, because 136253393 - 2⁸ = 136253137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136253303) 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, 765380 + ... + 765557.

It is an arithmetic number, because the mean of its divisors is an integer number (34446105).

Almost surely, 2^136253393 is an apocalyptic number.

It is an amenable number.

136253393 is a deficient number, since it is larger than the sum of its proper divisors (1531027).

136253393 is an equidigital number, since it uses as much as digits as its factorization.

136253393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531026.

The product of its digits is 43740, while the sum is 35.

The square root of 136253393 is about 11672.7628691754. The cubic root of 136253393 is about 514.5755046636.

The spelling of 136253393 in words is "one hundred thirty-six million, two hundred fifty-three thousand, three hundred ninety-three".