7949785873 has 2 divisors, whose sum is σ = 7949785874. Its totient is φ = 7949785872.

The previous prime is 7949785859. The next prime is 7949785919. The reversal of 7949785873 is 3785879497.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7342261969 + 607523904 = 85687^2 + 24648^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7949785873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7949785799 and 7949785808.

It is not a weakly prime, because it can be changed into another prime (7949785073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3974892936 + 3974892937.

It is an arithmetic number, because the mean of its divisors is an integer number (3974892937).

Almost surely, 2^7949785873 is an apocalyptic number.

It is an amenable number.

7949785873 is a deficient number, since it is larger than the sum of its proper divisors (1).

7949785873 is an equidigital number, since it uses as much as digits as its factorization.

7949785873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 106686720, while the sum is 67.

The square root of 7949785873 is about 89161.5717279591. The cubic root of 7949785873 is about 1995.8067036942.

The spelling of 7949785873 in words is "seven billion, nine hundred forty-nine million, seven hundred eighty-five thousand, eight hundred seventy-three".