331920077 has 4 divisors (see below), whose sum is σ = 336874176. Its totient is φ = 326965980.

The previous prime is 331920059. The next prime is 331920097. The reversal of 331920077 is 770029133.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 331920077 - 2⁶ = 331920013 is a prime.

It is a super-2 number, since 2×331920077² = 220341875031371858, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331920097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2476949 + ... + 2477082.

It is an arithmetic number, because the mean of its divisors is an integer number (84218544).

Almost surely, 2^331920077 is an apocalyptic number.

It is an amenable number.

331920077 is a deficient number, since it is larger than the sum of its proper divisors (4954099).

331920077 is an equidigital number, since it uses as much as digits as its factorization.

331920077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4954098.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 331920077 is about 18218.6738540433. The cubic root of 331920077 is about 692.3799890213.

The spelling of 331920077 in words is "three hundred thirty-one million, nine hundred twenty thousand, seventy-seven".