134686431 has 36 divisors (see below), whose sum is σ = 215059936. Its totient is φ = 81164160.

The previous prime is 134686403. The next prime is 134686441.

It is a happy number.

134686431 is a `hidden beast` number, since 1 + 3 + 4 + 6 + 8 + 643 + 1 = 666.

134686431 is nontrivially palindromic in base 10.

134686431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 134686431 - 2⁹ = 134685919 is a prime.

It is a super-2 number, since 2×134686431² = 36280869391035522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134686441) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 366810 + ... + 367176.

Almost surely, 2^134686431 is an apocalyptic number.

134686431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

134686431 is a deficient number, since it is larger than the sum of its proper divisors (80373505).

134686431 is a wasteful number, since it uses less digits than its factorization.

134686431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732 (or 718 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 134686431 is about 11605.4483325721. The cubic root of 134686431 is about 512.5952942767.

The spelling of 134686431 in words is "one hundred thirty-four million, six hundred eighty-six thousand, four hundred thirty-one".