686923065 has 64 divisors (see below), whose sum is σ = 1267495680. Its totient is φ = 352719360.

The previous prime is 686923051. The next prime is 686923067. The reversal of 686923065 is 560329686.

It is a happy number.

It is not a de Polignac number, because 686923065 - 2⁴ = 686923049 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 686923065.

It is not an unprimeable number, because it can be changed into a prime (686923067) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 422955 + ... + 424575.

It is an arithmetic number, because the mean of its divisors is an integer number (19804620).

Almost surely, 2^686923065 is an apocalyptic number.

It is an amenable number.

686923065 is a deficient number, since it is larger than the sum of its proper divisors (580572615).

686923065 is a wasteful number, since it uses less digits than its factorization.

686923065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751 (or 1745 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 686923065 is about 26209.2171764057. The cubic root of 686923065 is about 882.3401321317.

The spelling of 686923065 in words is "six hundred eighty-six million, nine hundred twenty-three thousand, sixty-five".