2921939397913 has 2 divisors, whose sum is σ = 2921939397914. Its totient is φ = 2921939397912.

The previous prime is 2921939397851. The next prime is 2921939397931. The reversal of 2921939397913 is 3197939391292.

Together with next prime (2921939397931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2913685130304 + 8254267609 = 1706952^2 + 90853^2 .

It is a cyclic number.

It is not a de Polignac number, because 2921939397913 - 2⁹ = 2921939397401 is a prime.

It is not a weakly prime, because it can be changed into another prime (2921939397943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1460969698956 + 1460969698957.

It is an arithmetic number, because the mean of its divisors is an integer number (1460969698957).

Almost surely, 2^{2921939397913} is an apocalyptic number.

It is an amenable number.

2921939397913 is a deficient number, since it is larger than the sum of its proper divisors (1).

2921939397913 is an equidigital number, since it uses as much as digits as its factorization.

2921939397913 is an evil number, because the sum of its binary digits is even.

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

The spelling of 2921939397913 in words is "two trillion, nine hundred twenty-one billion, nine hundred thirty-nine million, three hundred ninety-seven thousand, nine hundred thirteen".