2098981 has 2 divisors, whose sum is σ = 2098982. Its totient is φ = 2098980.

The previous prime is 2098961. The next prime is 2099017. The reversal of 2098981 is 1898902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2076481 + 22500 = 1441^2 + 150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2098981 - 2¹⁷ = 1967909 is a prime.

It is a super-2 number, since 2×2098981² = 8811442476722, which contains 22 as substring.

2098981 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2098981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2098931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1049490 + 1049491.

It is an arithmetic number, because the mean of its divisors is an integer number (1049491).

2^2098981 is an apocalyptic number.

It is an amenable number.

2098981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2098981 is an equidigital number, since it uses as much as digits as its factorization.

2098981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 2098981 is about 1448.7860435551. The cubic root of 2098981 is about 128.0372002878.

The spelling of 2098981 in words is "two million, ninety-eight thousand, nine hundred eighty-one".