689774771 has 8 divisors (see below), whose sum is σ = 788870400. Its totient is φ = 590818248.

The previous prime is 689774759. The next prime is 689774791. The reversal of 689774771 is 177477986.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689774771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689774741) 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 7 ways as a sum of consecutive naturals, for example, 23921 + ... + 44178.

It is an arithmetic number, because the mean of its divisors is an integer number (98608800).

Almost surely, 2^689774771 is an apocalyptic number.

689774771 is a deficient number, since it is larger than the sum of its proper divisors (99095629).

689774771 is a wasteful number, since it uses less digits than its factorization.

689774771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69553.

The product of its digits is 4148928, while the sum is 56.

The square root of 689774771 is about 26263.5635624719. The cubic root of 689774771 is about 883.5594344991.

The spelling of 689774771 in words is "six hundred eighty-nine million, seven hundred seventy-four thousand, seven hundred seventy-one".