2981819639 has 2 divisors, whose sum is σ = 2981819640. Its totient is φ = 2981819638.

The previous prime is 2981819573. The next prime is 2981819651. The reversal of 2981819639 is 9369181892.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2981819639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2981819039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1490909819 + 1490909820.

It is an arithmetic number, because the mean of its divisors is an integer number (1490909820).

Almost surely, 2^2981819639 is an apocalyptic number.

2981819639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2981819639 is an equidigital number, since it uses as much as digits as its factorization.

2981819639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 56.

The square root of 2981819639 is about 54606.0403160676. The cubic root of 2981819639 is about 1439.3302632420.

The spelling of 2981819639 in words is "two billion, nine hundred eighty-one million, eight hundred nineteen thousand, six hundred thirty-nine".