676259921 has 2 divisors, whose sum is σ = 676259922. Its totient is φ = 676259920.

The previous prime is 676259861. The next prime is 676259963. The reversal of 676259921 is 129952676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 630562321 + 45697600 = 25111^2 + 6760^2 .

It is a cyclic number.

It is not a de Polignac number, because 676259921 - 2¹⁴ = 676243537 is a prime.

It is not a weakly prime, because it can be changed into another prime (676259971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338129960 + 338129961.

It is an arithmetic number, because the mean of its divisors is an integer number (338129961).

Almost surely, 2^676259921 is an apocalyptic number.

It is an amenable number.

676259921 is a deficient number, since it is larger than the sum of its proper divisors (1).

676259921 is an equidigital number, since it uses as much as digits as its factorization.

676259921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 47.

The square root of 676259921 is about 26004.9980003845. The cubic root of 676259921 is about 877.7507646615.

The spelling of 676259921 in words is "six hundred seventy-six million, two hundred fifty-nine thousand, nine hundred twenty-one".