7942645787 has 2 divisors, whose sum is σ = 7942645788. Its totient is φ = 7942645786.

The previous prime is 7942645759. The next prime is 7942645861. The reversal of 7942645787 is 7875462497.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7942645787 - 2¹² = 7942641691 is a prime.

It is not a weakly prime, because it can be changed into another prime (7942641787) 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, 3971322893 + 3971322894.

It is an arithmetic number, because the mean of its divisors is an integer number (3971322894).

Almost surely, 2^7942645787 is an apocalyptic number.

7942645787 is a deficient number, since it is larger than the sum of its proper divisors (1).

7942645787 is an equidigital number, since it uses as much as digits as its factorization.

7942645787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23708160, while the sum is 59.

The square root of 7942645787 is about 89121.5225801265. The cubic root of 7942645787 is about 1995.2090146438.

The spelling of 7942645787 in words is "seven billion, nine hundred forty-two million, six hundred forty-five thousand, seven hundred eighty-seven".