7981883509 has 2 divisors, whose sum is σ = 7981883510. Its totient is φ = 7981883508.

The previous prime is 7981883447. The next prime is 7981883531. The reversal of 7981883509 is 9053881897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7241499409 + 740384100 = 85097^2 + 27210^2 .

It is a cyclic number.

It is not a de Polignac number, because 7981883509 - 2¹⁵ = 7981850741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7981883549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3990941754 + 3990941755.

It is an arithmetic number, because the mean of its divisors is an integer number (3990941755).

Almost surely, 2^7981883509 is an apocalyptic number.

It is an amenable number.

7981883509 is a deficient number, since it is larger than the sum of its proper divisors (1).

7981883509 is an equidigital number, since it uses as much as digits as its factorization.

7981883509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 58.

The square root of 7981883509 is about 89341.3874360590. The cubic root of 7981883509 is about 1998.4891513723.

The spelling of 7981883509 in words is "seven billion, nine hundred eighty-one million, eight hundred eighty-three thousand, five hundred nine".