697446644 has 6 divisors (see below), whose sum is σ = 1220531634. Its totient is φ = 348723320.

The previous prime is 697446619. The next prime is 697446653. The reversal of 697446644 is 446644796.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 633126244 + 64320400 = 25162^2 + 8020^2 .

It is a junction number, because it is equal to n+sod(n) for n = 697446592 and 697446601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87180827 + ... + 87180834.

It is an arithmetic number, because the mean of its divisors is an integer number (203421939).

Almost surely, 2^697446644 is an apocalyptic number.

It is an amenable number.

697446644 is a deficient number, since it is larger than the sum of its proper divisors (523084990).

697446644 is a wasteful number, since it uses less digits than its factorization.

697446644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174361665 (or 174361663 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 50.

The square root of 697446644 is about 26409.2151341156. The cubic root of 697446644 is about 886.8230983222.

The spelling of 697446644 in words is "six hundred ninety-seven million, four hundred forty-six thousand, six hundred forty-four".