9000989971 has 2 divisors, whose sum is σ = 9000989972. Its totient is φ = 9000989970.

The previous prime is 9000989951. The next prime is 9000990071. The reversal of 9000989971 is 1799890009.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9000989971 - 2⁵ = 9000989939 is a prime.

It is not a weakly prime, because it can be changed into another prime (9000989941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4500494985 + 4500494986.

It is an arithmetic number, because the mean of its divisors is an integer number (4500494986).

Almost surely, 2^9000989971 is an apocalyptic number.

9000989971 is a deficient number, since it is larger than the sum of its proper divisors (1).

9000989971 is an equidigital number, since it uses as much as digits as its factorization.

9000989971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 52.

The square root of 9000989971 is about 94873.5472668752. The cubic root of 9000989971 is about 2080.1600877617.

The spelling of 9000989971 in words is "nine billion, nine hundred eighty-nine thousand, nine hundred seventy-one".