329674981 has 4 divisors (see below), whose sum is σ = 329986764. Its totient is φ = 329363200.

The previous prime is 329674913. The next prime is 329674991. The reversal of 329674981 is 189476923.

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

It can be written as a sum of positive squares in 2 ways, for example, as 176757025 + 152917956 = 13295^2 + 12366^2 .

It is a cyclic number.

It is not a de Polignac number, because 329674981 - 2⁷ = 329674853 is a prime.

It is a super-2 number, since 2×329674981² = 217371186194700722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (329674991) 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, 154300 + ... + 156421.

It is an arithmetic number, because the mean of its divisors is an integer number (82496691).

Almost surely, 2^329674981 is an apocalyptic number.

It is an amenable number.

329674981 is a deficient number, since it is larger than the sum of its proper divisors (311783).

329674981 is a wasteful number, since it uses less digits than its factorization.

329674981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311782.

The product of its digits is 653184, while the sum is 49.

The square root of 329674981 is about 18156.9540672438. The cubic root of 329674981 is about 690.8153778876.

The spelling of 329674981 in words is "three hundred twenty-nine million, six hundred seventy-four thousand, nine hundred eighty-one".