689851556 has 12 divisors (see below), whose sum is σ = 1246183680. Its totient is φ = 333799080.

The previous prime is 689851523. The next prime is 689851567. The reversal of 689851556 is 655158986.

It is a super-2 number, since 2×689851556² = 951790338631242272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 689851498 and 689851507.

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 3 ways as a sum of consecutive naturals, for example, 2781536 + ... + 2781783.

It is an arithmetic number, because the mean of its divisors is an integer number (103848640).

Almost surely, 2^689851556 is an apocalyptic number.

It is an amenable number.

689851556 is a deficient number, since it is larger than the sum of its proper divisors (556332124).

689851556 is a wasteful number, since it uses less digits than its factorization.

689851556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5563354 (or 5563352 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 53.

The square root of 689851556 is about 26265.0253378899. The cubic root of 689851556 is about 883.5922189174.

The spelling of 689851556 in words is "six hundred eighty-nine million, eight hundred fifty-one thousand, five hundred fifty-six".