7941989317 has 2 divisors, whose sum is σ = 7941989318. Its totient is φ = 7941989316.

The previous prime is 7941989269. The next prime is 7941989333. The reversal of 7941989317 is 7139891497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6221896641 + 1720092676 = 78879^2 + 41474^2 .

It is a cyclic number.

It is not a de Polignac number, because 7941989317 - 2³¹ = 5794505669 is a prime.

It is a super-2 number, since 2×7941989317² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7941989717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3970994658 + 3970994659.

It is an arithmetic number, because the mean of its divisors is an integer number (3970994659).

Almost surely, 2^7941989317 is an apocalyptic number.

It is an amenable number.

7941989317 is a deficient number, since it is larger than the sum of its proper divisors (1).

7941989317 is an equidigital number, since it uses as much as digits as its factorization.

7941989317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 58.

The square root of 7941989317 is about 89117.8394991710. The cubic root of 7941989317 is about 1995.1540442564.

The spelling of 7941989317 in words is "seven billion, nine hundred forty-one million, nine hundred eighty-nine thousand, three hundred seventeen".