689365893 has 4 divisors (see below), whose sum is σ = 919154528. Its totient is φ = 459577260.

The previous prime is 689365883. The next prime is 689365949. The reversal of 689365893 is 398563986.

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.

It is not a de Polignac number, because 689365893 - 2¹⁶ = 689300357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689365823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114894313 + ... + 114894318.

It is an arithmetic number, because the mean of its divisors is an integer number (229788632).

Almost surely, 2^689365893 is an apocalyptic number.

It is an amenable number.

689365893 is a deficient number, since it is larger than the sum of its proper divisors (229788635).

689365893 is a wasteful number, since it uses less digits than its factorization.

689365893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229788634.

The product of its digits is 8398080, while the sum is 57.

The square root of 689365893 is about 26255.7782783143. The cubic root of 689365893 is about 883.3848173940.

The spelling of 689365893 in words is "six hundred eighty-nine million, three hundred sixty-five thousand, eight hundred ninety-three".