1697680808 has 32 divisors (see below), whose sum is σ = 3221928360. Its totient is φ = 838533120.

The previous prime is 1697680783. The next prime is 1697680823. The reversal of 1697680808 is 8080867961.

It can be written as a sum of positive squares in 4 ways, for example, as 1684445764 + 13235044 = 41042^2 + 3638^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1697680808.

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, 495710 + ... + 499122.

Almost surely, 2^1697680808 is an apocalyptic number.

It is an amenable number.

1697680808 is a deficient number, since it is larger than the sum of its proper divisors (1524247552).

1697680808 is a wasteful number, since it uses less digits than its factorization.

1697680808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4157 (or 4153 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 53.

The square root of 1697680808 is about 41202.9223235440. The cubic root of 1697680808 is about 1192.9402161787.

The spelling of 1697680808 in words is "one billion, six hundred ninety-seven million, six hundred eighty thousand, eight hundred eight".