2201989 has 2 divisors, whose sum is σ = 2201990. Its totient is φ = 2201988.

The previous prime is 2201977. The next prime is 2202007. The reversal of 2201989 is 9891022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1890625 + 311364 = 1375^2 + 558^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201989 - 2⁵ = 2201957 is a prime.

It is a super-2 number, since 2×2201989² = 9697511112242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2201989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2201189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1100994 + 1100995.

It is an arithmetic number, because the mean of its divisors is an integer number (1100995).

2^2201989 is an apocalyptic number.

It is an amenable number.

2201989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201989 is an equidigital number, since it uses as much as digits as its factorization.

2201989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 2201989 is about 1483.9100377044. The cubic root of 2201989 is about 130.0983279759.

It can be divided in two parts, 220 and 1989, that multiplied together give a triangular number (437580 = T₉₃₅).

The spelling of 2201989 in words is "two million, two hundred one thousand, nine hundred eighty-nine".