689276991 has 8 divisors (see below), whose sum is σ = 989731120. Its totient is φ = 424170432.

The previous prime is 689276989. The next prime is 689276993. The reversal of 689276991 is 199672986.

It is an interprime number because it is at equal distance from previous prime (689276989) and next prime (689276993).

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

It is not a de Polignac number, because 689276991 - 2¹ = 689276989 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 (689276993) 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, 8836846 + ... + 8836923.

It is an arithmetic number, because the mean of its divisors is an integer number (123716390).

Almost surely, 2^689276991 is an apocalyptic number.

689276991 is a deficient number, since it is larger than the sum of its proper divisors (300454129).

689276991 is a wasteful number, since it uses less digits than its factorization.

689276991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17673785.

The product of its digits is 2939328, while the sum is 57.

The square root of 689276991 is about 26254.0852249702. The cubic root of 689276991 is about 883.3468414057.

The spelling of 689276991 in words is "six hundred eighty-nine million, two hundred seventy-six thousand, nine hundred ninety-one".