869887 has 2 divisors, whose sum is σ = 869888. Its totient is φ = 869886.

The previous prime is 869879. The next prime is 869893. The reversal of 869887 is 788968.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 869887 - 2³ = 869879 is a prime.

869887 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434943 + 434944.

It is an arithmetic number, because the mean of its divisors is an integer number (434944).

2⁸⁶⁹⁸⁸⁷ is an apocalyptic number.

869887 is a deficient number, since it is larger than the sum of its proper divisors (1).

869887 is an equidigital number, since it uses as much as digits as its factorization.

869887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 46.

The square root of 869887 is about 932.6773289836. The cubic root of 869887 is about 95.4598937978.

The spelling of 869887 in words is "eight hundred sixty-nine thousand, eight hundred eighty-seven".