2111442989 has 2 divisors, whose sum is σ = 2111442990. Its totient is φ = 2111442988.

The previous prime is 2111442979. The next prime is 2111443003. The reversal of 2111442989 is 9892441112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2101488964 + 9954025 = 45842^2 + 3155^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111442989 - 2⁸ = 2111442733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111442929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055721494 + 1055721495.

It is an arithmetic number, because the mean of its divisors is an integer number (1055721495).

Almost surely, 2^2111442989 is an apocalyptic number.

It is an amenable number.

2111442989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111442989 is an equidigital number, since it uses as much as digits as its factorization.

2111442989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 41.

The square root of 2111442989 is about 45950.4405746017. The cubic root of 2111442989 is about 1282.9009296628.

The spelling of 2111442989 in words is "two billion, one hundred eleven million, four hundred forty-two thousand, nine hundred eighty-nine".