697380652889 has 2 divisors, whose sum is σ = 697380652890. Its totient is φ = 697380652888.

The previous prime is 697380652823. The next prime is 697380652961. The reversal of 697380652889 is 988256083796.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 695289145600 + 2091507289 = 833840^2 + 45733^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-697380652889 is a prime.

It is not a weakly prime, because it can be changed into another prime (697380652589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348690326444 + 348690326445.

It is an arithmetic number, because the mean of its divisors is an integer number (348690326445).

Almost surely, 2^697380652889 is an apocalyptic number.

It is an amenable number.

697380652889 is a deficient number, since it is larger than the sum of its proper divisors (1).

697380652889 is an equidigital number, since it uses as much as digits as its factorization.

697380652889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 313528320, while the sum is 71.

The spelling of 697380652889 in words is "six hundred ninety-seven billion, three hundred eighty million, six hundred fifty-two thousand, eight hundred eighty-nine".