2921939397943 has 2 divisors, whose sum is σ = 2921939397944. Its totient is φ = 2921939397942.

The previous prime is 2921939397931. The next prime is 2921939398097. The reversal of 2921939397943 is 3497939391292.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2921939397943 - 2³³ = 2913349463351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2921939397913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1460969698971 + 1460969698972.

It is an arithmetic number, because the mean of its divisors is an integer number (1460969698972).

Almost surely, 2^{2921939397943} is an apocalyptic number.

2921939397943 is a deficient number, since it is larger than the sum of its proper divisors (1).

2921939397943 is an equidigital number, since it uses as much as digits as its factorization.

2921939397943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 178564176, while the sum is 70.

The spelling of 2921939397943 in words is "two trillion, nine hundred twenty-one billion, nine hundred thirty-nine million, three hundred ninety-seven thousand, nine hundred forty-three".