689463191 has 4 divisors (see below), whose sum is σ = 689525112. Its totient is φ = 689401272.

The previous prime is 689463133. The next prime is 689463193. The reversal of 689463191 is 191364986.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 689463191 - 2²² = 685268887 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 (689463193) 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, 9125 + ... + 38238.

It is an arithmetic number, because the mean of its divisors is an integer number (172381278).

Almost surely, 2^689463191 is an apocalyptic number.

689463191 is a deficient number, since it is larger than the sum of its proper divisors (61921).

689463191 is a wasteful number, since it uses less digits than its factorization.

689463191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61920.

The product of its digits is 279936, while the sum is 47.

The square root of 689463191 is about 26257.6311003106. The cubic root of 689463191 is about 883.4263761334.

The spelling of 689463191 in words is "six hundred eighty-nine million, four hundred sixty-three thousand, one hundred ninety-one".