331430986 has 4 divisors (see below), whose sum is σ = 497146482. Its totient is φ = 165715492.

The previous prime is 331430947. The next prime is 331430999. The reversal of 331430986 is 689034133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689034133 = 617 ⋅1116749.

It can be written as a sum of positive squares in only one way, i.e., 255200625 + 76230361 = 15975^2 + 8731^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82857745 + ... + 82857748.

Almost surely, 2^331430986 is an apocalyptic number.

331430986 is a deficient number, since it is larger than the sum of its proper divisors (165715496).

331430986 is a wasteful number, since it uses less digits than its factorization.

331430986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165715495.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 331430986 is about 18205.2461120414. The cubic root of 331430986 is about 692.0397431705.

The spelling of 331430986 in words is "three hundred thirty-one million, four hundred thirty thousand, nine hundred eighty-six".