2941998821 has 2 divisors, whose sum is σ = 2941998822. Its totient is φ = 2941998820.

The previous prime is 2941998799. The next prime is 2941998847. The reversal of 2941998821 is 1288991492.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2933413921 + 8584900 = 54161^2 + 2930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2941998821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2941998881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1470999410 + 1470999411.

It is an arithmetic number, because the mean of its divisors is an integer number (1470999411).

Almost surely, 2^2941998821 is an apocalyptic number.

It is an amenable number.

2941998821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2941998821 is an equidigital number, since it uses as much as digits as its factorization.

2941998821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 53.

The square root of 2941998821 is about 54240.1956209599. The cubic root of 2941998821 is about 1432.8943320368.

The spelling of 2941998821 in words is "two billion, nine hundred forty-one million, nine hundred ninety-eight thousand, eight hundred twenty-one".