319427491 has 2 divisors, whose sum is σ = 319427492. Its totient is φ = 319427490.

The previous prime is 319427453. The next prime is 319427527. The reversal of 319427491 is 194724913.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 319427491 - 2¹⁵ = 319394723 is a prime.

It is not a weakly prime, because it can be changed into another prime (319427191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159713745 + 159713746.

It is an arithmetic number, because the mean of its divisors is an integer number (159713746).

Almost surely, 2^319427491 is an apocalyptic number.

319427491 is a deficient number, since it is larger than the sum of its proper divisors (1).

319427491 is an equidigital number, since it uses as much as digits as its factorization.

319427491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 319427491 is about 17872.5345432594. The cubic root of 319427491 is about 683.5822282431.

The spelling of 319427491 in words is "three hundred nineteen million, four hundred twenty-seven thousand, four hundred ninety-one".