87786887 has 2 divisors, whose sum is σ = 87786888. Its totient is φ = 87786886.

The previous prime is 87786871. The next prime is 87786889. The reversal of 87786887 is 78868778.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87786887 - 2⁴ = 87786871 is a prime.

Together with 87786889, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87786889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43893443 + 43893444.

It is an arithmetic number, because the mean of its divisors is an integer number (43893444).

Almost surely, 2^87786887 is an apocalyptic number.

87786887 is a deficient number, since it is larger than the sum of its proper divisors (1).

87786887 is an equidigital number, since it uses as much as digits as its factorization.

87786887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8429568, while the sum is 59.

The square root of 87786887 is about 9369.4656731321. The cubic root of 87786887 is about 444.4366679727.

The spelling of 87786887 in words is "eighty-seven million, seven hundred eighty-six thousand, eight hundred eighty-seven".