689549593 has 4 divisors (see below), whose sum is σ = 691986448. Its totient is φ = 687112740.

The previous prime is 689549561. The next prime is 689549599. The reversal of 689549593 is 395945986.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 395945986 = 2 ⋅197972993.

It is a cyclic number.

It is not a de Polignac number, because 689549593 - 2⁵ = 689549561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689549599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1218003 + ... + 1218568.

It is an arithmetic number, because the mean of its divisors is an integer number (172996612).

Almost surely, 2^689549593 is an apocalyptic number.

It is an amenable number.

689549593 is a deficient number, since it is larger than the sum of its proper divisors (2436855).

689549593 is a wasteful number, since it uses less digits than its factorization.

689549593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436854.

The product of its digits is 10497600, while the sum is 58.

The square root of 689549593 is about 26259.2763228540. The cubic root of 689549593 is about 883.4632776042.

The spelling of 689549593 in words is "six hundred eighty-nine million, five hundred forty-nine thousand, five hundred ninety-three".