908999863 has 2 divisors, whose sum is σ = 908999864. Its totient is φ = 908999862.

The previous prime is 908999849. The next prime is 908999891. The reversal of 908999863 is 368999809.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 908999863 - 2¹⁷ = 908868791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (908999803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454499931 + 454499932.

It is an arithmetic number, because the mean of its divisors is an integer number (454499932).

Almost surely, 2^908999863 is an apocalyptic number.

908999863 is a deficient number, since it is larger than the sum of its proper divisors (1).

908999863 is an equidigital number, since it uses as much as digits as its factorization.

908999863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7558272, while the sum is 61.

The square root of 908999863 is about 30149.6245913610. The cubic root of 908999863 is about 968.6969654324.

The spelling of 908999863 in words is "nine hundred eight million, nine hundred ninety-nine thousand, eight hundred sixty-three".