2921939397931 has 2 divisors, whose sum is σ = 2921939397932. Its totient is φ = 2921939397930.

The previous prime is 2921939397913. The next prime is 2921939397943. The reversal of 2921939397931 is 1397939391292.

Together with previous prime (2921939397913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2921939397931 - 2³⁷ = 2784500444459 is a prime.

It is a super-2 number, since 2×2921939397931² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2921939337931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1460969698965 + 1460969698966.

It is an arithmetic number, because the mean of its divisors is an integer number (1460969698966).

Almost surely, 2^{2921939397931} is an apocalyptic number.

2921939397931 is a deficient number, since it is larger than the sum of its proper divisors (1).

2921939397931 is an equidigital number, since it uses as much as digits as its factorization.

2921939397931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44641044, while the sum is 67.

The spelling of 2921939397931 in words is "two trillion, nine hundred twenty-one billion, nine hundred thirty-nine million, three hundred ninety-seven thousand, nine hundred thirty-one".