9172942847 has 2 divisors, whose sum is σ = 9172942848. Its totient is φ = 9172942846.

The previous prime is 9172942799. The next prime is 9172942853. The reversal of 9172942847 is 7482492719.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9172942847 - 2¹⁰ = 9172941823 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9172942897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4586471423 + 4586471424.

It is an arithmetic number, because the mean of its divisors is an integer number (4586471424).

Almost surely, 2^9172942847 is an apocalyptic number.

9172942847 is a deficient number, since it is larger than the sum of its proper divisors (1).

9172942847 is an equidigital number, since it uses as much as digits as its factorization.

9172942847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 53.

The square root of 9172942847 is about 95775.4814501081. The cubic root of 9172942847 is about 2093.3229228666.

The spelling of 9172942847 in words is "nine billion, one hundred seventy-two million, nine hundred forty-two thousand, eight hundred forty-seven".