690883685 has 8 divisors (see below), whose sum is σ = 829201536. Its totient is φ = 552612880.

The previous prime is 690883679. The next prime is 690883703. The reversal of 690883685 is 586388096.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-690883685 is a prime.

It is a Duffinian number.

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 in 7 ways as a sum of consecutive naturals, for example, 51200 + ... + 63270.

It is an arithmetic number, because the mean of its divisors is an integer number (103650192).

Almost surely, 2^690883685 is an apocalyptic number.

It is an amenable number.

690883685 is a deficient number, since it is larger than the sum of its proper divisors (138317851).

690883685 is a wasteful number, since it uses less digits than its factorization.

690883685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23523.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The square root of 690883685 is about 26284.6663475114. Note that the first 3 decimals coincide. The cubic root of 690883685 is about 884.0326647396.

The spelling of 690883685 in words is "six hundred ninety million, eight hundred eighty-three thousand, six hundred eighty-five".