690868684 has 24 divisors (see below), whose sum is σ = 1331998416. Its totient is φ = 310920000.

The previous prime is 690868663. The next prime is 690868721. The reversal of 690868684 is 486868096.

It is a happy number.

690868684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73287 + ... + 82174.

It is an arithmetic number, because the mean of its divisors is an integer number (55499934).

Almost surely, 2^690868684 is an apocalyptic number.

It is an amenable number.

690868684 is a deficient number, since it is larger than the sum of its proper divisors (641129732).

690868684 is a wasteful number, since it uses less digits than its factorization.

690868684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155577 (or 155575 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 55.

The square root of 690868684 is about 26284.3809894774. The cubic root of 690868684 is about 884.0262664267.

The spelling of 690868684 in words is "six hundred ninety million, eight hundred sixty-eight thousand, six hundred eighty-four".