689050825 has 6 divisors (see below), whose sum is σ = 854423054. Its totient is φ = 551240640.

The previous prime is 689050807. The next prime is 689050897. The reversal of 689050825 is 528050986.

It can be written as a sum of positive squares in 3 ways, for example, as 82955664 + 606095161 = 9108^2 + 24619^2 .

It is not a de Polignac number, because 689050825 - 2¹³ = 689042633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13780992 + ... + 13781041.

Almost surely, 2^689050825 is an apocalyptic number.

It is an amenable number.

689050825 is a deficient number, since it is larger than the sum of its proper divisors (165372229).

689050825 is a wasteful number, since it uses less digits than its factorization.

689050825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27562043 (or 27562038 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 689050825 is about 26249.7776181056. Note that the first 3 decimals coincide. The cubic root of 689050825 is about 883.2502160629.

The spelling of 689050825 in words is "six hundred eighty-nine million, fifty thousand, eight hundred twenty-five".