689991692 has 12 divisors (see below), whose sum is σ = 1300369056. Its totient is φ = 318457680.

The previous prime is 689991689. The next prime is 689991713. The reversal of 689991692 is 296199986.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6634484 + ... + 6634587.

It is an arithmetic number, because the mean of its divisors is an integer number (108364088).

Almost surely, 2^689991692 is an apocalyptic number.

It is an amenable number.

689991692 is a deficient number, since it is larger than the sum of its proper divisors (610377364).

689991692 is a wasteful number, since it uses less digits than its factorization.

689991692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13269088 (or 13269086 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 59.

The square root of 689991692 is about 26267.6929325740. The cubic root of 689991692 is about 883.6520456509.

The spelling of 689991692 in words is "six hundred eighty-nine million, nine hundred ninety-one thousand, six hundred ninety-two".