863406372971 has 4 divisors (see below), whose sum is σ = 863415067200. Its totient is φ = 863397678744.

The previous prime is 863406372931. The next prime is 863406372989. The reversal of 863406372971 is 179273604368.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 863406372971 - 2²⁶ = 863339264107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863406372931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4196411 + ... + 4397348.

It is an arithmetic number, because the mean of its divisors is an integer number (215853766800).

Almost surely, 2^863406372971 is an apocalyptic number.

863406372971 is a deficient number, since it is larger than the sum of its proper divisors (8694229).

863406372971 is a wasteful number, since it uses less digits than its factorization.

863406372971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8694228.

The product of its (nonzero) digits is 9144576, while the sum is 56.

The spelling of 863406372971 in words is "eight hundred sixty-three billion, four hundred six million, three hundred seventy-two thousand, nine hundred seventy-one".