689814771 has 8 divisors (see below), whose sum is σ = 932707584. Its totient is φ = 453399240.

The previous prime is 689814757. The next prime is 689814773. The reversal of 689814771 is 177418986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 689814771 - 2⁵ = 689814739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (689814773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1619071 + ... + 1619496.

It is an arithmetic number, because the mean of its divisors is an integer number (116588448).

Almost surely, 2^689814771 is an apocalyptic number.

689814771 is a deficient number, since it is larger than the sum of its proper divisors (242892813).

689814771 is a wasteful number, since it uses less digits than its factorization.

689814771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238641.

The product of its digits is 677376, while the sum is 51.

The square root of 689814771 is about 26264.3250627158. The cubic root of 689814771 is about 883.5765133562.

The spelling of 689814771 in words is "six hundred eighty-nine million, eight hundred fourteen thousand, seven hundred seventy-one".