7487771887 has 2 divisors, whose sum is σ = 7487771888. Its totient is φ = 7487771886.

The previous prime is 7487771861. The next prime is 7487771897. The reversal of 7487771887 is 7881777847.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7487771887 - 2²³ = 7479383279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7487771897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3743885943 + 3743885944.

It is an arithmetic number, because the mean of its divisors is an integer number (3743885944).

Almost surely, 2^7487771887 is an apocalyptic number.

7487771887 is a deficient number, since it is larger than the sum of its proper divisors (1).

7487771887 is an equidigital number, since it uses as much as digits as its factorization.

7487771887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34420736, while the sum is 64.

The square root of 7487771887 is about 86531.9125352029. The cubic root of 7487771887 is about 1956.3694320453.

The spelling of 7487771887 in words is "seven billion, four hundred eighty-seven million, seven hundred seventy-one thousand, eight hundred eighty-seven".