863999997 has 12 divisors (see below), whose sum is σ = 1340081856. Its totient is φ = 493714200.

The previous prime is 863999971. The next prime is 863999999. The reversal of 863999997 is 799999368.

It is a happy number.

It is not a de Polignac number, because 863999997 - 2⁷ = 863999869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863999999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2938629 + ... + 2938922.

It is an arithmetic number, because the mean of its divisors is an integer number (111673488).

Almost surely, 2^863999997 is an apocalyptic number.

It is an amenable number.

863999997 is a deficient number, since it is larger than the sum of its proper divisors (476081859).

863999997 is a wasteful number, since it uses less digits than its factorization.

863999997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5877568 (or 5877561 counting only the distinct ones).

The product of its digits is 59521392, while the sum is 69.

The square root of 863999997 is about 29393.8768623671. The cubic root of 863999997 is about 952.4406300786.

The spelling of 863999997 in words is "eight hundred sixty-three million, nine hundred ninety-nine thousand, nine hundred ninety-seven".