2100899 has 2 divisors, whose sum is σ = 2100900. Its totient is φ = 2100898.

The previous prime is 2100893. The next prime is 2100913. The reversal of 2100899 is 9980012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100899 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050449 + 1050450.

It is an arithmetic number, because the mean of its divisors is an integer number (1050450).

2^2100899 is an apocalyptic number.

2100899 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100899 is an equidigital number, since it uses as much as digits as its factorization.

2100899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 2100899 is about 1449.4478258978. The cubic root of 2100899 is about 128.0761875532.

The spelling of 2100899 in words is "two million, one hundred thousand, eight hundred ninety-nine".