2098639 has 2 divisors, whose sum is σ = 2098640. Its totient is φ = 2098638.

The previous prime is 2098609. The next prime is 2098651. The reversal of 2098639 is 9368902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2098639 - 2⁷ = 2098511 is a prime.

It is a d-powerful number, because it can be written as 2 + 0 + 9² + 8⁷ + 6⁴ + 3³ + 9² .

It is a junction number, because it is equal to n+sod(n) for n = 2098598 and 2098607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2098609) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1049319 + 1049320.

It is an arithmetic number, because the mean of its divisors is an integer number (1049320).

2^2098639 is an apocalyptic number.

2098639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2098639 is an equidigital number, since it uses as much as digits as its factorization.

2098639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 2098639 is about 1448.6680088964. The cubic root of 2098639 is about 128.0302459449.

It can be divided in two parts, 20986 and 39, that added together give a square (21025 = 145²).

The spelling of 2098639 in words is "two million, ninety-eight thousand, six hundred thirty-nine".