361491321 has 12 divisors (see below), whose sum is σ = 508692912. Its totient is φ = 228309624.

The previous prime is 361491313. The next prime is 361491343. The reversal of 361491321 is 123194163.

It is not a de Polignac number, because 361491321 - 2³ = 361491313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (361491121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165811 + ... + 167976.

It is an arithmetic number, because the mean of its divisors is an integer number (42391076).

Almost surely, 2^361491321 is an apocalyptic number.

It is an amenable number.

361491321 is a deficient number, since it is larger than the sum of its proper divisors (147201591).

361491321 is a wasteful number, since it uses less digits than its factorization.

361491321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333828 (or 333809 counting only the distinct ones).

The product of its digits is 3888, while the sum is 30.

The square root of 361491321 is about 19012.9251037288. The cubic root of 361491321 is about 712.3596167867.

The spelling of 361491321 in words is "three hundred sixty-one million, four hundred ninety-one thousand, three hundred twenty-one".