689164065 has 32 divisors (see below), whose sum is σ = 1278455040. Its totient is φ = 351571968.

The previous prime is 689164027. The next prime is 689164081. The reversal of 689164065 is 560461986.

It is not a de Polignac number, because 689164065 - 2⁶ = 689164001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 689164065.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107872 + ... + 114081.

It is an arithmetic number, because the mean of its divisors is an integer number (39951720).

Almost surely, 2^689164065 is an apocalyptic number.

It is an amenable number.

689164065 is a deficient number, since it is larger than the sum of its proper divisors (589290975).

689164065 is a wasteful number, since it uses less digits than its factorization.

689164065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221990 (or 221984 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 689164065 is about 26251.9345001468. The cubic root of 689164065 is about 883.2985984522.

The spelling of 689164065 in words is "six hundred eighty-nine million, one hundred sixty-four thousand, sixty-five".