328133961 has 6 divisors (see below), whose sum is σ = 473971290. Its totient is φ = 218755968.

The previous prime is 328133959. The next prime is 328133963. The reversal of 328133961 is 169331823.

It is an interprime number because it is at equal distance from previous prime (328133959) and next prime (328133963).

It can be written as a sum of positive squares in only one way, i.e., 220700736 + 107433225 = 14856^2 + 10365^2 .

It is not a de Polignac number, because 328133961 - 2¹ = 328133959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (328133963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18229656 + ... + 18229673.

It is an arithmetic number, because the mean of its divisors is an integer number (78995215).

Almost surely, 2^328133961 is an apocalyptic number.

It is an amenable number.

328133961 is a deficient number, since it is larger than the sum of its proper divisors (145837329).

328133961 is a wasteful number, since it uses less digits than its factorization.

328133961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36459335 (or 36459332 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 328133961 is about 18114.4682781472. The cubic root of 328133961 is about 689.7373228240.

The spelling of 328133961 in words is "three hundred twenty-eight million, one hundred thirty-three thousand, nine hundred sixty-one".