329916431 has 4 divisors (see below), whose sum is σ = 355294632. Its totient is φ = 304538232.

The previous prime is 329916343. The next prime is 329916443. The reversal of 329916431 is 134619923.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-329916431 is a prime.

It is a super-2 number, since 2×329916431² = 217689702887555522, 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 (329916031) 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, 12689081 + ... + 12689106.

It is an arithmetic number, because the mean of its divisors is an integer number (88823658).

Almost surely, 2^329916431 is an apocalyptic number.

329916431 is a deficient number, since it is larger than the sum of its proper divisors (25378201).

329916431 is a wasteful number, since it uses less digits than its factorization.

329916431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25378200.

The product of its digits is 34992, while the sum is 38.

The square root of 329916431 is about 18163.6018179215. The cubic root of 329916431 is about 690.9839850300.

The spelling of 329916431 in words is "three hundred twenty-nine million, nine hundred sixteen thousand, four hundred thirty-one".