676403491 has 2 divisors, whose sum is σ = 676403492. Its totient is φ = 676403490.

The previous prime is 676403447. The next prime is 676403513. The reversal of 676403491 is 194304676.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 676403491 - 2¹⁷ = 676272419 is a prime.

It is not a weakly prime, because it can be changed into another prime (676403411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338201745 + 338201746.

It is an arithmetic number, because the mean of its divisors is an integer number (338201746).

Almost surely, 2^676403491 is an apocalyptic number.

676403491 is a deficient number, since it is larger than the sum of its proper divisors (1).

676403491 is an equidigital number, since it uses as much as digits as its factorization.

676403491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 676403491 is about 26007.7582847888. The cubic root of 676403491 is about 877.8128757702.

The spelling of 676403491 in words is "six hundred seventy-six million, four hundred three thousand, four hundred ninety-one".