2921939390807 has 2 divisors, whose sum is σ = 2921939390808. Its totient is φ = 2921939390806.

The previous prime is 2921939390801. The next prime is 2921939390833. The reversal of 2921939390807 is 7080939391292.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2921939390807 - 2⁶ = 2921939390743 is a prime.

It is a super-2 number, since 2×2921939390807² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2921939390807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2921939390801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1460969695403 + 1460969695404.

It is an arithmetic number, because the mean of its divisors is an integer number (1460969695404).

Almost surely, 2^{2921939390807} is an apocalyptic number.

2921939390807 is a deficient number, since it is larger than the sum of its proper divisors (1).

2921939390807 is an equidigital number, since it uses as much as digits as its factorization.

2921939390807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13226976, while the sum is 62.

The spelling of 2921939390807 in words is "two trillion, nine hundred twenty-one billion, nine hundred thirty-nine million, three hundred ninety thousand, eight hundred seven".