134636731 has 4 divisors (see below), whose sum is σ = 135415152. Its totient is φ = 133858312.

The previous prime is 134636713. The next prime is 134636771. The reversal of 134636731 is 137636431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137636431 = 1949 ⋅70619.

It is a cyclic number.

It is not a de Polignac number, because 134636731 - 2⁹ = 134636219 is a prime.

It is a super-2 number, since 2×134636731² = 36254098668732722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134636771) 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, 388951 + ... + 389296.

It is an arithmetic number, because the mean of its divisors is an integer number (33853788).

Almost surely, 2^134636731 is an apocalyptic number.

134636731 is a deficient number, since it is larger than the sum of its proper divisors (778421).

134636731 is an equidigital number, since it uses as much as digits as its factorization.

134636731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778420.

The product of its digits is 27216, while the sum is 34.

The square root of 134636731 is about 11603.3068993283. The cubic root of 134636731 is about 512.5322364018.

It can be divided in two parts, 13463 and 6731, that multiplied together give a triangular number (90619453 = T₁₃₄₆₂).

The spelling of 134636731 in words is "one hundred thirty-four million, six hundred thirty-six thousand, seven hundred thirty-one".