689194867 has 4 divisors (see below), whose sum is σ = 690270696. Its totient is φ = 688119040.

The previous prime is 689194843. The next prime is 689194903. The reversal of 689194867 is 768491986.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 689194867 - 2¹⁹ = 688670579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689194267) 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, 536953 + ... + 538234.

It is an arithmetic number, because the mean of its divisors is an integer number (172567674).

Almost surely, 2^689194867 is an apocalyptic number.

689194867 is a deficient number, since it is larger than the sum of its proper divisors (1075829).

689194867 is a wasteful number, since it uses less digits than its factorization.

689194867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075828.

The product of its digits is 5225472, while the sum is 58.

The square root of 689194867 is about 26252.5211551196. The cubic root of 689194867 is about 883.3117578528.

The spelling of 689194867 in words is "six hundred eighty-nine million, one hundred ninety-four thousand, eight hundred sixty-seven".