136922431 has 4 divisors (see below), whose sum is σ = 136945864. Its totient is φ = 136899000.

The previous prime is 136922419. The next prime is 136922477. The reversal of 136922431 is 134229631.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 136922431 - 2⁵ = 136922399 is a prime.

It is a super-2 number, since 2×136922431² = 37495504221899522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136922393 and 136922402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136923431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4981 + ... + 17281.

It is an arithmetic number, because the mean of its divisors is an integer number (34236466).

Almost surely, 2^136922431 is an apocalyptic number.

136922431 is a deficient number, since it is larger than the sum of its proper divisors (23433).

136922431 is a wasteful number, since it uses less digits than its factorization.

136922431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23432.

The product of its digits is 7776, while the sum is 31.

The square root of 136922431 is about 11701.3858580939. The cubic root of 136922431 is about 515.4163610670.

The spelling of 136922431 in words is "one hundred thirty-six million, nine hundred twenty-two thousand, four hundred thirty-one".