689019090 has 16 divisors (see below), whose sum is σ = 1653645888. Its totient is φ = 183738416.

The previous prime is 689019083. The next prime is 689019101. The reversal of 689019090 is 90910986.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 11483622 + ... + 11483681.

It is an arithmetic number, because the mean of its divisors is an integer number (103352868).

Almost surely, 2^689019090 is an apocalyptic number.

689019090 is an abundant number, since it is smaller than the sum of its proper divisors (964626798).

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

689019090 is a wasteful number, since it uses less digits than its factorization.

689019090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22967313.

The product of its (nonzero) digits is 34992, while the sum is 42.

The square root of 689019090 is about 26249.1731298340. The cubic root of 689019090 is about 883.2366561652.

The spelling of 689019090 in words is "six hundred eighty-nine million, nineteen thousand, ninety".