329508961 has 4 divisors (see below), whose sum is σ = 332588592. Its totient is φ = 326429332.

The previous prime is 329508953. The next prime is 329508967. The reversal of 329508961 is 169805923.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 329508961 - 2³ = 329508953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (329508967) 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, 1539655 + ... + 1539868.

It is an arithmetic number, because the mean of its divisors is an integer number (83147148).

Almost surely, 2^329508961 is an apocalyptic number.

It is an amenable number.

329508961 is a deficient number, since it is larger than the sum of its proper divisors (3079631).

329508961 is a wasteful number, since it uses less digits than its factorization.

329508961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3079630.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 329508961 is about 18152.3816894643. The cubic root of 329508961 is about 690.6993965595.

The spelling of 329508961 in words is "three hundred twenty-nine million, five hundred eight thousand, nine hundred sixty-one".