331701493 has 2 divisors, whose sum is σ = 331701494. Its totient is φ = 331701492.

The previous prime is 331701413. The next prime is 331701511. The reversal of 331701493 is 394107133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218980804 + 112720689 = 14798^2 + 10617^2 .

It is a cyclic number.

It is not a de Polignac number, because 331701493 - 2¹³ = 331693301 is a prime.

It is a super-2 number, since 2×331701493² = 220051760916858098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331701413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165850746 + 165850747.

It is an arithmetic number, because the mean of its divisors is an integer number (165850747).

Almost surely, 2^331701493 is an apocalyptic number.

It is an amenable number.

331701493 is a deficient number, since it is larger than the sum of its proper divisors (1).

331701493 is an equidigital number, since it uses as much as digits as its factorization.

331701493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 331701493 is about 18212.6739662247. The cubic root of 331701493 is about 692.2279680658.

The spelling of 331701493 in words is "three hundred thirty-one million, seven hundred one thousand, four hundred ninety-three".