7923321331481 has 2 divisors, whose sum is σ = 7923321331482. Its totient is φ = 7923321331480.

The previous prime is 7923321331283. The next prime is 7923321331567. The reversal of 7923321331481 is 1841331233297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7837536193600 + 85785137881 = 2799560^2 + 292891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7923321331481 is a prime.

It is a super-2 number, since 2×7923321331481² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7923321361481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3961660665740 + 3961660665741.

It is an arithmetic number, because the mean of its divisors is an integer number (3961660665741).

Almost surely, 2^{7923321331481} is an apocalyptic number.

It is an amenable number.

7923321331481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7923321331481 is an equidigital number, since it uses as much as digits as its factorization.

7923321331481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 47.

The spelling of 7923321331481 in words is "seven trillion, nine hundred twenty-three billion, three hundred twenty-one million, three hundred thirty-one thousand, four hundred eighty-one".