136693389 has 32 divisors (see below), whose sum is σ = 215654400. Its totient is φ = 76969200.

The previous prime is 136693369. The next prime is 136693397. The reversal of 136693389 is 983396631.

It is a happy number.

It is not a de Polignac number, because 136693389 - 2⁷ = 136693261 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136693309) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72124 + ... + 73994.

It is an arithmetic number, because the mean of its divisors is an integer number (6739200).

Almost surely, 2^136693389 is an apocalyptic number.

It is an amenable number.

136693389 is a deficient number, since it is larger than the sum of its proper divisors (78961011).

136693389 is an equidigital number, since it uses as much as digits as its factorization.

136693389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966 (or 1952 counting only the distinct ones).

The product of its digits is 629856, while the sum is 48.

The square root of 136693389 is about 11691.5948013947. The cubic root of 136693389 is about 515.1288068174.

The spelling of 136693389 in words is "one hundred thirty-six million, six hundred ninety-three thousand, three hundred eighty-nine".