2971922861 has 2 divisors, whose sum is σ = 2971922862. Its totient is φ = 2971922860.

The previous prime is 2971922831. The next prime is 2971922893. The reversal of 2971922861 is 1682291792.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2971885225 + 37636 = 54515^2 + 194^2 .

It is a cyclic number.

It is not a de Polignac number, because 2971922861 - 2¹⁰ = 2971921837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2971922831) 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, 1485961430 + 1485961431.

It is an arithmetic number, because the mean of its divisors is an integer number (1485961431).

Almost surely, 2^2971922861 is an apocalyptic number.

It is an amenable number.

2971922861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2971922861 is an equidigital number, since it uses as much as digits as its factorization.

2971922861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 47.

The square root of 2971922861 is about 54515.3451883045. The cubic root of 2971922861 is about 1437.7361001084.

The spelling of 2971922861 in words is "two billion, nine hundred seventy-one million, nine hundred twenty-two thousand, eight hundred sixty-one".