8991552971 has 2 divisors, whose sum is σ = 8991552972. Its totient is φ = 8991552970.

The previous prime is 8991552967. The next prime is 8991553009. The reversal of 8991552971 is 1792551998.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8991552971 - 2² = 8991552967 is a prime.

It is not a weakly prime, because it can be changed into another prime (8991555971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4495776485 + 4495776486.

It is an arithmetic number, because the mean of its divisors is an integer number (4495776486).

Almost surely, 2^8991552971 is an apocalyptic number.

8991552971 is a deficient number, since it is larger than the sum of its proper divisors (1).

8991552971 is an equidigital number, since it uses as much as digits as its factorization.

8991552971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 56.

The square root of 8991552971 is about 94823.7996022096. The cubic root of 8991552971 is about 2079.4328590432.

The spelling of 8991552971 in words is "eight billion, nine hundred ninety-one million, five hundred fifty-two thousand, nine hundred seventy-one".