331341391 has 2 divisors, whose sum is σ = 331341392. Its totient is φ = 331341390.

The previous prime is 331341341. The next prime is 331341449. The reversal of 331341391 is 193143133.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 331341391 - 2¹³ = 331333199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331341301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165670695 + 165670696.

It is an arithmetic number, because the mean of its divisors is an integer number (165670696).

Almost surely, 2^331341391 is an apocalyptic number.

331341391 is a deficient number, since it is larger than the sum of its proper divisors (1).

331341391 is an equidigital number, since it uses as much as digits as its factorization.

331341391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916, while the sum is 28.

The square root of 331341391 is about 18202.7852539110. The cubic root of 331341391 is about 691.9773783633.

The spelling of 331341391 in words is "three hundred thirty-one million, three hundred forty-one thousand, three hundred ninety-one".