689624956 has 6 divisors (see below), whose sum is σ = 1206843680. Its totient is φ = 344812476.

The previous prime is 689624909. The next prime is 689624987. The reversal of 689624956 is 659426986.

It is a happy number.

It is a super-3 number, since 3×689624956³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 689624897 and 689624906.

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, 86203116 + ... + 86203123.

Almost surely, 2^689624956 is an apocalyptic number.

It is an amenable number.

689624956 is a deficient number, since it is larger than the sum of its proper divisors (517218724).

689624956 is a wasteful number, since it uses less digits than its factorization.

689624956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172406243 (or 172406241 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 55.

The square root of 689624956 is about 26260.7112622640. The cubic root of 689624956 is about 883.4954619065.

The spelling of 689624956 in words is "six hundred eighty-nine million, six hundred twenty-four thousand, nine hundred fifty-six".