985241891 has 2 divisors, whose sum is σ = 985241892. Its totient is φ = 985241890.

The previous prime is 985241879. The next prime is 985241897. The reversal of 985241891 is 198142589.

It is a strong prime.

It is an emirp because it is prime and its reverse (198142589) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 985241891 - 2¹⁸ = 984979747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (985241897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492620945 + 492620946.

It is an arithmetic number, because the mean of its divisors is an integer number (492620946).

Almost surely, 2^985241891 is an apocalyptic number.

985241891 is a deficient number, since it is larger than the sum of its proper divisors (1).

985241891 is an equidigital number, since it uses as much as digits as its factorization.

985241891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 47.

The square root of 985241891 is about 31388.5630604524. The cubic root of 985241891 is about 995.0562297457.

The spelling of 985241891 in words is "nine hundred eighty-five million, two hundred forty-one thousand, eight hundred ninety-one".