689746994 has 8 divisors (see below), whose sum is σ = 1034985600. Its totient is φ = 344751796.

The previous prime is 689746979. The next prime is 689747029. The reversal of 689746994 is 499647986.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 53594 + ... + 65205.

It is an arithmetic number, because the mean of its divisors is an integer number (129373200).

Almost surely, 2^689746994 is an apocalyptic number.

689746994 is a deficient number, since it is larger than the sum of its proper divisors (345238606).

689746994 is a wasteful number, since it uses less digits than its factorization.

689746994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121704.

The product of its digits is 23514624, while the sum is 62.

The square root of 689746994 is about 26263.0347446749. The cubic root of 689746994 is about 883.5475741253.

The spelling of 689746994 in words is "six hundred eighty-nine million, seven hundred forty-six thousand, nine hundred ninety-four".