689995506 has 16 divisors (see below), whose sum is σ = 1392652800. Its totient is φ = 227888208.

The previous prime is 689995483. The next prime is 689995511. The reversal of 689995506 is 605599986.

689995506 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, 526866 + ... + 528173.

It is an arithmetic number, because the mean of its divisors is an integer number (87040800).

Almost surely, 2^689995506 is an apocalyptic number.

689995506 is an abundant number, since it is smaller than the sum of its proper divisors (702657294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689995506 is a wasteful number, since it uses less digits than its factorization.

689995506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055153.

The product of its (nonzero) digits is 5248800, while the sum is 57.

The square root of 689995506 is about 26267.7655311600. The cubic root of 689995506 is about 883.6536738071.

The spelling of 689995506 in words is "six hundred eighty-nine million, nine hundred ninety-five thousand, five hundred six".