2921087993 has 2 divisors, whose sum is σ = 2921087994. Its totient is φ = 2921087992.

The previous prime is 2921087971. The next prime is 2921087999. The reversal of 2921087993 is 3997801292.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2769601129 + 151486864 = 52627^2 + 12308^2 .

It is a cyclic number.

It is not a de Polignac number, because 2921087993 - 2¹⁶ = 2921022457 is a prime.

It is not a weakly prime, because it can be changed into another prime (2921087999) 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, 1460543996 + 1460543997.

It is an arithmetic number, because the mean of its divisors is an integer number (1460543997).

Almost surely, 2^2921087993 is an apocalyptic number.

It is an amenable number.

2921087993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2921087993 is an equidigital number, since it uses as much as digits as its factorization.

2921087993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 2921087993 is about 54047.0905137363. The cubic root of 2921087993 is about 1429.4913986690.

The spelling of 2921087993 in words is "two billion, nine hundred twenty-one million, eighty-seven thousand, nine hundred ninety-three".