7903982081 has 2 divisors, whose sum is σ = 7903982082. Its totient is φ = 7903982080.

The previous prime is 7903982041. The next prime is 7903982087. The reversal of 7903982081 is 1802893097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6143424400 + 1760557681 = 78380^2 + 41959^2 .

It is an emirp because it is prime and its reverse (1802893097) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7903982081 - 2¹⁴ = 7903965697 is a prime.

It is a super-2 number, since 2×7903982081² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7903982087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3951991040 + 3951991041.

It is an arithmetic number, because the mean of its divisors is an integer number (3951991041).

Almost surely, 2^7903982081 is an apocalyptic number.

It is an amenable number.

7903982081 is a deficient number, since it is larger than the sum of its proper divisors (1).

7903982081 is an equidigital number, since it uses as much as digits as its factorization.

7903982081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 7903982081 is about 88904.3423067737. The cubic root of 7903982081 is about 1991.9662796270.

The spelling of 7903982081 in words is "seven billion, nine hundred three million, nine hundred eighty-two thousand, eighty-one".