697594397 has 2 divisors, whose sum is σ = 697594398. Its totient is φ = 697594396.

The previous prime is 697594361. The next prime is 697594399. The reversal of 697594397 is 793495796.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 635594521 + 61999876 = 25211^2 + 7874^2 .

697594397 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 697594397 - 2⁸ = 697594141 is a prime.

Together with 697594399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697594399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348797198 + 348797199.

It is an arithmetic number, because the mean of its divisors is an integer number (348797199).

Almost surely, 2^697594397 is an apocalyptic number.

It is an amenable number.

697594397 is a deficient number, since it is larger than the sum of its proper divisors (1).

697594397 is an equidigital number, since it uses as much as digits as its factorization.

697594397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12859560, while the sum is 59.

The square root of 697594397 is about 26412.0123618023. The cubic root of 697594397 is about 886.8857179375.

The spelling of 697594397 in words is "six hundred ninety-seven million, five hundred ninety-four thousand, three hundred ninety-seven".