7949785819 has 2 divisors, whose sum is σ = 7949785820. Its totient is φ = 7949785818.

The previous prime is 7949785817. The next prime is 7949785829. The reversal of 7949785819 is 9185879497.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7949785819 - 2¹ = 7949785817 is a prime.

It is a super-2 number, since 2×7949785819² (a number of 21 digits) contains 22 as substring.

Together with 7949785817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7949785817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3974892909 + 3974892910.

It is an arithmetic number, because the mean of its divisors is an integer number (3974892910).

Almost surely, 2^7949785819 is an apocalyptic number.

7949785819 is a deficient number, since it is larger than the sum of its proper divisors (1).

7949785819 is an equidigital number, since it uses as much as digits as its factorization.

7949785819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45722880, while the sum is 67.

The square root of 7949785819 is about 89161.5714251381. The cubic root of 7949785819 is about 1995.8066991753.

The spelling of 7949785819 in words is "seven billion, nine hundred forty-nine million, seven hundred eighty-five thousand, eight hundred nineteen".