136699431 has 16 divisors (see below), whose sum is σ = 210532608. Its totient is φ = 77974400.

The previous prime is 136699403. The next prime is 136699441. The reversal of 136699431 is 134996631.

136699431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 136699431 - 2¹⁷ = 136568359 is a prime.

It is a super-2 number, since 2×136699431² = 37373468871447522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136699441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121275 + ... + 122396.

It is an arithmetic number, because the mean of its divisors is an integer number (13158288).

Almost surely, 2^136699431 is an apocalyptic number.

136699431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

136699431 is a deficient number, since it is larger than the sum of its proper divisors (73833177).

136699431 is a wasteful number, since it uses less digits than its factorization.

136699431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243702.

The product of its digits is 104976, while the sum is 42.

The square root of 136699431 is about 11691.8531892938. The cubic root of 136699431 is about 515.1363964612.

The spelling of 136699431 in words is "one hundred thirty-six million, six hundred ninety-nine thousand, four hundred thirty-one".