689401756 has 6 divisors (see below), whose sum is σ = 1206453080. Its totient is φ = 344700876.

The previous prime is 689401733. The next prime is 689401771. The reversal of 689401756 is 657104986.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86175216 + ... + 86175223.

Almost surely, 2^689401756 is an apocalyptic number.

It is an amenable number.

689401756 is a deficient number, since it is larger than the sum of its proper divisors (517051324).

689401756 is a wasteful number, since it uses less digits than its factorization.

689401756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172350443 (or 172350441 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 689401756 is about 26256.4612238588. The cubic root of 689401756 is about 883.4001359550.

The spelling of 689401756 in words is "six hundred eighty-nine million, four hundred one thousand, seven hundred fifty-six".