676571521 has 2 divisors, whose sum is σ = 676571522. Its totient is φ = 676571520.

The previous prime is 676571509. The next prime is 676571527. The reversal of 676571521 is 125175676.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 606932496 + 69639025 = 24636^2 + 8345^2 .

It is a cyclic number.

It is not a de Polignac number, because 676571521 - 2¹¹ = 676569473 is a prime.

It is not a weakly prime, because it can be changed into another prime (676571527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338285760 + 338285761.

It is an arithmetic number, because the mean of its divisors is an integer number (338285761).

Almost surely, 2^676571521 is an apocalyptic number.

It is an amenable number.

676571521 is a deficient number, since it is larger than the sum of its proper divisors (1).

676571521 is an equidigital number, since it uses as much as digits as its factorization.

676571521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88200, while the sum is 40.

The square root of 676571521 is about 26010.9884664155. The cubic root of 676571521 is about 877.8855575780.

The spelling of 676571521 in words is "six hundred seventy-six million, five hundred seventy-one thousand, five hundred twenty-one".