87555487 has 2 divisors, whose sum is σ = 87555488. Its totient is φ = 87555486.

The previous prime is 87555383. The next prime is 87555509. The reversal of 87555487 is 78455578.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87555487 - 2¹¹ = 87553439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87555487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87555187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43777743 + 43777744.

It is an arithmetic number, because the mean of its divisors is an integer number (43777744).

Almost surely, 2^87555487 is an apocalyptic number.

87555487 is a deficient number, since it is larger than the sum of its proper divisors (1).

87555487 is an equidigital number, since it uses as much as digits as its factorization.

87555487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1568000, while the sum is 49.

The square root of 87555487 is about 9357.1089017923. The cubic root of 87555487 is about 444.0458231932.

Subtracting from 87555487 its reverse (78455578), we obtain a palindrome (9099909).

The spelling of 87555487 in words is "eighty-seven million, five hundred fifty-five thousand, four hundred eighty-seven".