697966613 has 2 divisors, whose sum is σ = 697966614. Its totient is φ = 697966612.

The previous prime is 697966609. The next prime is 697966673. The reversal of 697966613 is 316669796.

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., 396527569 + 301439044 = 19913^2 + 17362^2 .

It is a cyclic number.

It is not a de Polignac number, because 697966613 - 2² = 697966609 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697966673) 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, 348983306 + 348983307.

It is an arithmetic number, because the mean of its divisors is an integer number (348983307).

Almost surely, 2^697966613 is an apocalyptic number.

It is an amenable number.

697966613 is a deficient number, since it is larger than the sum of its proper divisors (1).

697966613 is an equidigital number, since it uses as much as digits as its factorization.

697966613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2204496, while the sum is 53.

The square root of 697966613 is about 26419.0577613964. The cubic root of 697966613 is about 887.0434286646.

The spelling of 697966613 in words is "six hundred ninety-seven million, nine hundred sixty-six thousand, six hundred thirteen".