2117849 has 2 divisors, whose sum is σ = 2117850. Its totient is φ = 2117848.

The previous prime is 2117833. The next prime is 2117861. The reversal of 2117849 is 9487112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1708249 + 409600 = 1307^2 + 640^2 .

It is a cyclic number.

It is not a de Polignac number, because 2117849 - 2⁴ = 2117833 is a prime.

It is a super-3 number, since 3×2117849³ = 28497465159906333147, which contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2107849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058924 + 1058925.

It is an arithmetic number, because the mean of its divisors is an integer number (1058925).

2^2117849 is an apocalyptic number.

It is an amenable number.

2117849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117849 is an equidigital number, since it uses as much as digits as its factorization.

2117849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 2117849 is about 1455.2831339640. The cubic root of 2117849 is about 128.4197038566.

The spelling of 2117849 in words is "two million, one hundred seventeen thousand, eight hundred forty-nine".