2991789037 has 2 divisors, whose sum is σ = 2991789038. Its totient is φ = 2991789036.

The previous prime is 2991789011. The next prime is 2991789043. The reversal of 2991789037 is 7309871992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2317555881 + 674233156 = 48141^2 + 25966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2991789037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2991759037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1495894518 + 1495894519.

It is an arithmetic number, because the mean of its divisors is an integer number (1495894519).

Almost surely, 2^2991789037 is an apocalyptic number.

It is an amenable number.

2991789037 is a deficient number, since it is larger than the sum of its proper divisors (1).

2991789037 is an equidigital number, since it uses as much as digits as its factorization.

2991789037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1714608, while the sum is 55.

The square root of 2991789037 is about 54697.2488979108. The cubic root of 2991789037 is about 1440.9325616013.

The spelling of 2991789037 in words is "two billion, nine hundred ninety-one million, seven hundred eighty-nine thousand, thirty-seven".