689633950 has 24 divisors (see below), whose sum is σ = 1283676768. Its totient is φ = 275647680.

The previous prime is 689633947. The next prime is 689633963. The reversal of 689633950 is 59336986.

It is a junction number, because it is equal to n+sod(n) for n = 689633894 and 689633903.

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 in 11 ways as a sum of consecutive naturals, for example, 74794 + ... + 83506.

It is an arithmetic number, because the mean of its divisors is an integer number (53486532).

Almost surely, 2^689633950 is an apocalyptic number.

689633950 is a deficient number, since it is larger than the sum of its proper divisors (594042818).

689633950 is a wasteful number, since it uses less digits than its factorization.

689633950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10308 (or 10303 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 49.

The square root of 689633950 is about 26260.8825061154. The cubic root of 689633950 is about 883.4993027012.

The spelling of 689633950 in words is "six hundred eighty-nine million, six hundred thirty-three thousand, nine hundred fifty".