9142638971 has 2 divisors, whose sum is σ = 9142638972. Its totient is φ = 9142638970.

The previous prime is 9142638961. The next prime is 9142639039. The reversal of 9142638971 is 1798362419.

9142638971 is digitally balanced in base 2, 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 a de Polignac number, because none of the positive numbers 2^k-9142638971 is a prime.

It is not a weakly prime, because it can be changed into another prime (9142638961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4571319485 + 4571319486.

It is an arithmetic number, because the mean of its divisors is an integer number (4571319486).

Almost surely, 2^9142638971 is an apocalyptic number.

9142638971 is a deficient number, since it is larger than the sum of its proper divisors (1).

9142638971 is an equidigital number, since it uses as much as digits as its factorization.

9142638971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 9142638971 is about 95617.1478919969. The cubic root of 9142638971 is about 2091.0152017182.

The spelling of 9142638971 in words is "nine billion, one hundred forty-two million, six hundred thirty-eight thousand, nine hundred seventy-one".