87788287 has 2 divisors, whose sum is σ = 87788288. Its totient is φ = 87788286.

The previous prime is 87788243. The next prime is 87788293. The reversal of 87788287 is 78288778.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87788287 - 2¹⁵ = 87755519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87788237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43894143 + 43894144.

It is an arithmetic number, because the mean of its divisors is an integer number (43894144).

Almost surely, 2^87788287 is an apocalyptic number.

87788287 is a deficient number, since it is larger than the sum of its proper divisors (1).

87788287 is an equidigital number, since it uses as much as digits as its factorization.

87788287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2809856, while the sum is 55.

The square root of 87788287 is about 9369.5403836047. The cubic root of 87788287 is about 444.4390305428.

It can be divided in two parts, 877882 and 87, that added together give a square (877969 = 937²).

The spelling of 87788287 in words is "eighty-seven million, seven hundred eighty-eight thousand, two hundred eighty-seven".