87255863 has 2 divisors, whose sum is σ = 87255864. Its totient is φ = 87255862.

The previous prime is 87255853. The next prime is 87255881. The reversal of 87255863 is 36855278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87255863 - 2¹² = 87251767 is a prime.

It is a super-2 number, since 2×87255863² = 15227171255749538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87255853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43627931 + 43627932.

It is an arithmetic number, because the mean of its divisors is an integer number (43627932).

Almost surely, 2^87255863 is an apocalyptic number.

87255863 is a deficient number, since it is larger than the sum of its proper divisors (1).

87255863 is an equidigital number, since it uses as much as digits as its factorization.

87255863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 44.

The square root of 87255863 is about 9341.0846800572. The cubic root of 87255863 is about 443.5387206073.

The spelling of 87255863 in words is "eighty-seven million, two hundred fifty-five thousand, eight hundred sixty-three".