87855863 has 2 divisors, whose sum is σ = 87855864. Its totient is φ = 87855862.

The previous prime is 87855857. The next prime is 87855869. The reversal of 87855863 is 36855878.

It is a balanced prime because it is at equal distance from previous prime (87855857) and next prime (87855869).

It is a cyclic number.

It is not a de Polignac number, because 87855863 - 2¹⁶ = 87790327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87855869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43927931 + 43927932.

It is an arithmetic number, because the mean of its divisors is an integer number (43927932).

Almost surely, 2^87855863 is an apocalyptic number.

87855863 is a deficient number, since it is larger than the sum of its proper divisors (1).

87855863 is an equidigital number, since it uses as much as digits as its factorization.

87855863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1612800, while the sum is 50.

The square root of 87855863 is about 9373.1458433122. The cubic root of 87855863 is about 444.5530385731.

The spelling of 87855863 in words is "eighty-seven million, eight hundred fifty-five thousand, eight hundred sixty-three".