2819099021 has 2 divisors, whose sum is σ = 2819099022. Its totient is φ = 2819099020.

The previous prime is 2819098993. The next prime is 2819099039. The reversal of 2819099021 is 1209909182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2261478025 + 557620996 = 47555^2 + 23614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2819099021 - 2¹⁰ = 2819097997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2819099021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2819099051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1409549510 + 1409549511.

It is an arithmetic number, because the mean of its divisors is an integer number (1409549511).

Almost surely, 2^2819099021 is an apocalyptic number.

It is an amenable number.

2819099021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2819099021 is an equidigital number, since it uses as much as digits as its factorization.

2819099021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 2819099021 is about 53095.1883036495. The cubic root of 2819099021 is about 1412.6571661701.

The spelling of 2819099021 in words is "two billion, eight hundred nineteen million, ninety-nine thousand, twenty-one".