7942407691 has 2 divisors, whose sum is σ = 7942407692. Its totient is φ = 7942407690.

The previous prime is 7942407689. The next prime is 7942407709. The reversal of 7942407691 is 1967042497.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7942407691 - 2¹ = 7942407689 is a prime.

Together with 7942407689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7942407391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3971203845 + 3971203846.

It is an arithmetic number, because the mean of its divisors is an integer number (3971203846).

Almost surely, 2^7942407691 is an apocalyptic number.

7942407691 is a deficient number, since it is larger than the sum of its proper divisors (1).

7942407691 is an equidigital number, since it uses as much as digits as its factorization.

7942407691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 49.

The square root of 7942407691 is about 89120.1867760610. The cubic root of 7942407691 is about 1995.1890777091.

The spelling of 7942407691 in words is "seven billion, nine hundred forty-two million, four hundred seven thousand, six hundred ninety-one".