863904023 has 2 divisors, whose sum is σ = 863904024. Its totient is φ = 863904022.

The previous prime is 863903987. The next prime is 863904029. The reversal of 863904023 is 320409368.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 863904023 - 2¹⁸ = 863641879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (863904029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431952011 + 431952012.

It is an arithmetic number, because the mean of its divisors is an integer number (431952012).

Almost surely, 2^863904023 is an apocalyptic number.

863904023 is a deficient number, since it is larger than the sum of its proper divisors (1).

863904023 is an equidigital number, since it uses as much as digits as its factorization.

863904023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 863904023 is about 29392.2442661325. The cubic root of 863904023 is about 952.4053627475.

The spelling of 863904023 in words is "eight hundred sixty-three million, nine hundred four thousand, twenty-three".