689132279 has 16 divisors (see below), whose sum is σ = 788901120. Its totient is φ = 595858560.

The previous prime is 689132273. The next prime is 689132293. The reversal of 689132279 is 972231986.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-689132279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689132273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37679 + ... + 52895.

It is an arithmetic number, because the mean of its divisors is an integer number (49306320).

Almost surely, 2^689132279 is an apocalyptic number.

689132279 is a deficient number, since it is larger than the sum of its proper divisors (99768841).

689132279 is a wasteful number, since it uses less digits than its factorization.

689132279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15430.

The product of its digits is 326592, while the sum is 47.

The square root of 689132279 is about 26251.3290901623. The cubic root of 689132279 is about 883.2850182506.

The spelling of 689132279 in words is "six hundred eighty-nine million, one hundred thirty-two thousand, two hundred seventy-nine".