331677993 has 8 divisors (see below), whose sum is σ = 445166656. Its totient is φ = 219654000.

The previous prime is 331677977. The next prime is 331678019. The reversal of 331677993 is 399776133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 331677993 - 2⁴ = 331677977 is a prime.

It is a super-2 number, since 2×331677993² = 220020582081016098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331677193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365638 + ... + 366543.

It is an arithmetic number, because the mean of its divisors is an integer number (55645832).

Almost surely, 2^331677993 is an apocalyptic number.

It is an amenable number.

331677993 is a deficient number, since it is larger than the sum of its proper divisors (113488663).

331677993 is a wasteful number, since it uses less digits than its factorization.

331677993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732335.

The product of its digits is 642978, while the sum is 48.

The square root of 331677993 is about 18212.0287996697. The cubic root of 331677993 is about 692.2116202935.

The spelling of 331677993 in words is "three hundred thirty-one million, six hundred seventy-seven thousand, nine hundred ninety-three".