697768 has 8 divisors (see below), whose sum is σ = 1308330. Its totient is φ = 348880.

The previous prime is 697759. The next prime is 697787. The reversal of 697768 is 867796.

It can be written as a sum of positive squares in only one way, i.e., 381924 + 315844 = 618^2 + 562^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43603 + ... + 43618.

2⁶⁹⁷⁷⁶⁸ is an apocalyptic number.

697768 is the 447-th centered heptagonal number.

It is an amenable number.

697768 is a deficient number, since it is larger than the sum of its proper divisors (610562).

697768 is a wasteful number, since it uses less digits than its factorization.

697768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87227 (or 87223 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 697768 is about 835.3250864185. The cubic root of 697768 is about 88.6959281817.

The spelling of 697768 in words is "six hundred ninety-seven thousand, seven hundred sixty-eight".