689098187 has 2 divisors, whose sum is σ = 689098188. Its totient is φ = 689098186.

The previous prime is 689098183. The next prime is 689098237. The reversal of 689098187 is 781890986.

It is a happy number.

689098187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689098187 - 2² = 689098183 is a prime.

It is a super-2 number, since 2×689098187² = 949712622653373938, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (689098181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344549093 + 344549094.

It is an arithmetic number, because the mean of its divisors is an integer number (344549094).

Almost surely, 2^689098187 is an apocalyptic number.

689098187 is a deficient number, since it is larger than the sum of its proper divisors (1).

689098187 is an equidigital number, since it uses as much as digits as its factorization.

689098187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 56.

The square root of 689098187 is about 26250.6797435800. The cubic root of 689098187 is about 883.2704523729.

The spelling of 689098187 in words is "six hundred eighty-nine million, ninety-eight thousand, one hundred eighty-seven".