7887487 has 2 divisors, whose sum is σ = 7887488. Its totient is φ = 7887486.

The previous prime is 7887479. The next prime is 7887491. The reversal of 7887487 is 7847887.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7887487 - 2³ = 7887479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7887487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7887427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3943743 + 3943744.

It is an arithmetic number, because the mean of its divisors is an integer number (3943744).

Almost surely, 2^7887487 is an apocalyptic number.

7887487 is a deficient number, since it is larger than the sum of its proper divisors (1).

7887487 is an equidigital number, since it uses as much as digits as its factorization.

7887487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 702464, while the sum is 49.

The square root of 7887487 is about 2808.4670195678. The cubic root of 7887487 is about 199.0579614502.

It can be divided in two parts, 78874 and 87, that added together give a square (78961 = 281²).

The spelling of 7887487 in words is "seven million, eight hundred eighty-seven thousand, four hundred eighty-seven".