689282891 has 4 divisors (see below), whose sum is σ = 751944984. Its totient is φ = 626620800.

The previous prime is 689282887. The next prime is 689282903. The reversal of 689282891 is 198282986.

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 689282891 - 2² = 689282887 is a prime.

It is a super-2 number, since 2×689282891² = 950221807650635762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689282491) 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, 31331030 + ... + 31331051.

It is an arithmetic number, because the mean of its divisors is an integer number (187986246).

Almost surely, 2^689282891 is an apocalyptic number.

689282891 is a deficient number, since it is larger than the sum of its proper divisors (62662093).

689282891 is a wasteful number, since it uses less digits than its factorization.

689282891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62662092.

The product of its digits is 995328, while the sum is 53.

The square root of 689282891 is about 26254.1975881953. The cubic root of 689282891 is about 883.3493617914.

The spelling of 689282891 in words is "six hundred eighty-nine million, two hundred eighty-two thousand, eight hundred ninety-one".