129032313 has 4 divisors (see below), whose sum is σ = 172043088. Its totient is φ = 86021540.

The previous prime is 129032311. The next prime is 129032333. The reversal of 129032313 is 313230921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 313230921 = 3 ⋅104410307.

It is a cyclic number.

It is not a de Polignac number, because 129032313 - 2¹ = 129032311 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129032311) 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, 21505383 + ... + 21505388.

It is an arithmetic number, because the mean of its divisors is an integer number (43010772).

Almost surely, 2^129032313 is an apocalyptic number.

It is an amenable number.

129032313 is a deficient number, since it is larger than the sum of its proper divisors (43010775).

129032313 is an equidigital number, since it uses as much as digits as its factorization.

129032313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43010774.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 129032313 is about 11359.2391030385. The cubic root of 129032313 is about 505.3196199061.

The spelling of 129032313 in words is "one hundred twenty-nine million, thirty-two thousand, three hundred thirteen".