6321492391 has 2 divisors, whose sum is σ = 6321492392. Its totient is φ = 6321492390.

The previous prime is 6321492383. The next prime is 6321492409. The reversal of 6321492391 is 1932941236.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6321492391 - 2³ = 6321492383 is a prime.

It is a super-2 number, since 2×6321492391² = 79922532098941793762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6321492341) 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, 3160746195 + 3160746196.

It is an arithmetic number, because the mean of its divisors is an integer number (3160746196).

Almost surely, 2^6321492391 is an apocalyptic number.

6321492391 is a deficient number, since it is larger than the sum of its proper divisors (1).

6321492391 is an equidigital number, since it uses as much as digits as its factorization.

6321492391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 40.

The square root of 6321492391 is about 79507.8133959173. The cubic root of 6321492391 is about 1849.0126107679.

The spelling of 6321492391 in words is "six billion, three hundred twenty-one million, four hundred ninety-two thousand, three hundred ninety-one".