331977 has 8 divisors (see below), whose sum is σ = 453600. Its totient is φ = 215840.

The previous prime is 331973. The next prime is 331997. The reversal of 331977 is 779133.

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

It is a cyclic number.

It is not a de Polignac number, because 331977 - 2² = 331973 is a prime.

It is a super-2 number, since 2×331977² = 220417457058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1227 + ... + 1472.

It is an arithmetic number, because the mean of its divisors is an integer number (56700).

2³³¹⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

331977 is a deficient number, since it is larger than the sum of its proper divisors (121623).

331977 is a wasteful number, since it uses less digits than its factorization.

331977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743.

The product of its digits is 3969, while the sum is 30.

The square root of 331977 is about 576.1744527485. The cubic root of 331977 is about 69.2419566916.

The spelling of 331977 in words is "three hundred thirty-one thousand, nine hundred seventy-seven".