136399223 has 4 divisors (see below), whose sum is σ = 142329648. Its totient is φ = 130468800.

The previous prime is 136399201. The next prime is 136399229. The reversal of 136399223 is 322993631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136399223 - 2¹⁴ = 136382839 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 (136399229) 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, 2965178 + ... + 2965223.

It is an arithmetic number, because the mean of its divisors is an integer number (35582412).

Almost surely, 2^136399223 is an apocalyptic number.

136399223 is a deficient number, since it is larger than the sum of its proper divisors (5930425).

136399223 is an equidigital number, since it uses as much as digits as its factorization.

136399223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5930424.

The product of its digits is 52488, while the sum is 38.

The square root of 136399223 is about 11679.0077917604. The cubic root of 136399223 is about 514.7590200695.

The spelling of 136399223 in words is "one hundred thirty-six million, three hundred ninety-nine thousand, two hundred twenty-three".