133431929 has 8 divisors (see below), whose sum is σ = 146153160. Its totient is φ = 121252096.

The previous prime is 133431923. The next prime is 133431941. The reversal of 133431929 is 929134331.

It can be written as a sum of positive squares in 4 ways, for example, as 73136704 + 60295225 = 8552^2 + 7765^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133431929 - 2⁴ = 133431913 is a prime.

It is a super-2 number, since 2×133431929² = 35608159353322082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133431923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134834 + ... + 135819.

It is an arithmetic number, because the mean of its divisors is an integer number (18269145).

Almost surely, 2^133431929 is an apocalyptic number.

It is an amenable number.

133431929 is a deficient number, since it is larger than the sum of its proper divisors (12721231).

133431929 is a wasteful number, since it uses less digits than its factorization.

133431929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270699.

The product of its digits is 17496, while the sum is 35.

The square root of 133431929 is about 11551.2739124306. The cubic root of 133431929 is about 510.9988485517.

The spelling of 133431929 in words is "one hundred thirty-three million, four hundred thirty-one thousand, nine hundred twenty-nine".