2098861 has 2 divisors, whose sum is σ = 2098862. Its totient is φ = 2098860.

The previous prime is 2098841. The next prime is 2098867. The reversal of 2098861 is 1688902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1232100 + 866761 = 1110^2 + 931^2 .

It is a cyclic number.

It is not a de Polignac number, because 2098861 - 2¹⁷ = 1967789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2098867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1049430 + 1049431.

It is an arithmetic number, because the mean of its divisors is an integer number (1049431).

2^2098861 is an apocalyptic number.

It is an amenable number.

2098861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2098861 is an equidigital number, since it uses as much as digits as its factorization.

2098861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 2098861 is about 1448.7446289806. The cubic root of 2098861 is about 128.0347602535.

The spelling of 2098861 in words is "two million, ninety-eight thousand, eight hundred sixty-one".