87774887 has 2 divisors, whose sum is σ = 87774888. Its totient is φ = 87774886.

The previous prime is 87774881. The next prime is 87774917. The reversal of 87774887 is 78847778.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87774887 - 2²⁴ = 70997671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87774881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43887443 + 43887444.

It is an arithmetic number, because the mean of its divisors is an integer number (43887444).

Almost surely, 2^87774887 is an apocalyptic number.

87774887 is a deficient number, since it is larger than the sum of its proper divisors (1).

87774887 is an equidigital number, since it uses as much as digits as its factorization.

87774887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4917248, while the sum is 56.

The square root of 87774887 is about 9368.8252732133. The cubic root of 87774887 is about 444.4164163413.

The spelling of 87774887 in words is "eighty-seven million, seven hundred seventy-four thousand, eight hundred eighty-seven".