2812445989 has 2 divisors, whose sum is σ = 2812445990. Its totient is φ = 2812445988.

The previous prime is 2812445971. The next prime is 2812446041. The reversal of 2812445989 is 9895442182.

It is a happy number.

It is an a-pointer prime, because the next prime (2812446041) can be obtained adding 2812445989 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1885730625 + 926715364 = 43425^2 + 30442^2 .

It is a cyclic number.

It is not a de Polignac number, because 2812445989 - 2¹⁵ = 2812413221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2812445939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1406222994 + 1406222995.

It is an arithmetic number, because the mean of its divisors is an integer number (1406222995).

Almost surely, 2^2812445989 is an apocalyptic number.

It is an amenable number.

2812445989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2812445989 is an equidigital number, since it uses as much as digits as its factorization.

2812445989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1658880, while the sum is 52.

The square root of 2812445989 is about 53032.4993659548. The cubic root of 2812445989 is about 1411.5450074776.

The spelling of 2812445989 in words is "two billion, eight hundred twelve million, four hundred forty-five thousand, nine hundred eighty-nine".