2208491 has 2 divisors, whose sum is σ = 2208492. Its totient is φ = 2208490.

The previous prime is 2208473. The next prime is 2208497. The reversal of 2208491 is 1948022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2208491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2208491.

It is not a weakly prime, because it can be changed into another prime (2208497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1104245 + 1104246.

It is an arithmetic number, because the mean of its divisors is an integer number (1104246).

2^2208491 is an apocalyptic number.

2208491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2208491 is an equidigital number, since it uses as much as digits as its factorization.

2208491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 2208491 is about 1486.0992564429. The cubic root of 2208491 is about 130.2262529421.

It can be divided in two parts, 2208 and 491, that multiplied together give a triangular number (1084128 = T₁₄₇₂).

The spelling of 2208491 in words is "two million, two hundred eight thousand, four hundred ninety-one".