210104891 has 2 divisors, whose sum is σ = 210104892. Its totient is φ = 210104890.

The previous prime is 210104849. The next prime is 210104893. The reversal of 210104891 is 198401012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210104891 - 2¹⁴ = 210088507 is a prime.

Together with 210104893, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210104891.

It is not a weakly prime, because it can be changed into another prime (210104893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105052445 + 105052446.

It is an arithmetic number, because the mean of its divisors is an integer number (105052446).

Almost surely, 2^210104891 is an apocalyptic number.

210104891 is a deficient number, since it is larger than the sum of its proper divisors (1).

210104891 is an equidigital number, since it uses as much as digits as its factorization.

210104891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 210104891 is about 14494.9953777157. The cubic root of 210104891 is about 594.4911413308.

The spelling of 210104891 in words is "two hundred ten million, one hundred four thousand, eight hundred ninety-one".