697637 has 2 divisors, whose sum is σ = 697638. Its totient is φ = 697636.

The previous prime is 697603. The next prime is 697643. The reversal of 697637 is 736796.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 591361 + 106276 = 769^2 + 326^2 .

It is a cyclic number.

It is not a de Polignac number, because 697637 - 2⁸ = 697381 is a prime.

It is a Chen prime.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 697637.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 697637.

It is not a weakly prime, because it can be changed into another prime (697687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348818 + 348819.

It is an arithmetic number, because the mean of its divisors is an integer number (348819).

2⁶⁹⁷⁶³⁷ is an apocalyptic number.

It is an amenable number.

697637 is a deficient number, since it is larger than the sum of its proper divisors (1).

697637 is an equidigital number, since it uses as much as digits as its factorization.

697637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 38.

The square root of 697637 is about 835.2466701520. The cubic root of 697637 is about 88.6903771993.

The spelling of 697637 in words is "six hundred ninety-seven thousand, six hundred thirty-seven".