697661473 has 2 divisors, whose sum is σ = 697661474. Its totient is φ = 697661472.

The previous prime is 697661449. The next prime is 697661509. The reversal of 697661473 is 374166796.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 585978849 + 111682624 = 24207^2 + 10568^2 .

It is a cyclic number.

It is not a de Polignac number, because 697661473 - 2⁵ = 697661441 is a prime.

It is not a weakly prime, because it can be changed into another prime (697661773) 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, 348830736 + 348830737.

It is an arithmetic number, because the mean of its divisors is an integer number (348830737).

Almost surely, 2^697661473 is an apocalyptic number.

It is an amenable number.

697661473 is a deficient number, since it is larger than the sum of its proper divisors (1).

697661473 is an equidigital number, since it uses as much as digits as its factorization.

697661473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 49.

The square root of 697661473 is about 26413.2821322909. The cubic root of 697661473 is about 886.9141426878.

The spelling of 697661473 in words is "six hundred ninety-seven million, six hundred sixty-one thousand, four hundred seventy-three".