9172942871 has 2 divisors, whose sum is σ = 9172942872. Its totient is φ = 9172942870.

The previous prime is 9172942853. The next prime is 9172942897. The reversal of 9172942871 is 1782492719.

9172942871 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9172942871 - 2²⁶ = 9105834007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9172947871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4586471435 + 4586471436.

It is an arithmetic number, because the mean of its divisors is an integer number (4586471436).

Almost surely, 2^9172942871 is an apocalyptic number.

9172942871 is a deficient number, since it is larger than the sum of its proper divisors (1).

9172942871 is an equidigital number, since it uses as much as digits as its factorization.

9172942871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 50.

The square root of 9172942871 is about 95775.4815754011. The cubic root of 9172942871 is about 2093.3229246922.

The spelling of 9172942871 in words is "nine billion, one hundred seventy-two million, nine hundred forty-two thousand, eight hundred seventy-one".