136940823 has 6 divisors (see below), whose sum is σ = 197803424. Its totient is φ = 91293876.

The previous prime is 136940821. The next prime is 136940833. The reversal of 136940823 is 328049631.

It is not a de Polignac number, because 136940823 - 2¹ = 136940821 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 (136940821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7607815 + ... + 7607832.

Almost surely, 2^136940823 is an apocalyptic number.

136940823 is a deficient number, since it is larger than the sum of its proper divisors (60862601).

136940823 is a wasteful number, since it uses less digits than its factorization.

136940823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15215653 (or 15215650 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 136940823 is about 11702.1717215225. The cubic root of 136940823 is about 515.4394376689.

The spelling of 136940823 in words is "one hundred thirty-six million, nine hundred forty thousand, eight hundred twenty-three".