696644 has 12 divisors (see below), whose sum is σ = 1313004. Its totient is φ = 321504.

The previous prime is 696629. The next prime is 696653. The reversal of 696644 is 446696.

696644 = T₁₃₇ + T₁₃₈ + ... + T₁₈₈.

It can be written as a sum of positive squares in 2 ways, for example, as 56644 + 640000 = 238^2 + 800^2 .

It is an unprimeable number.

696644 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6647 + ... + 6750.

It is an arithmetic number, because the mean of its divisors is an integer number (109417).

2⁶⁹⁶⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

696644 is a deficient number, since it is larger than the sum of its proper divisors (616360).

696644 is a wasteful number, since it uses less digits than its factorization.

696644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13414 (or 13412 counting only the distinct ones).

The product of its digits is 31104, while the sum is 35.

The square root of 696644 is about 834.6520233007. The cubic root of 696644 is about 88.6482772901.

The spelling of 696644 in words is "six hundred ninety-six thousand, six hundred forty-four".