971966899 has 2 divisors, whose sum is σ = 971966900. Its totient is φ = 971966898.

The previous prime is 971966861. The next prime is 971966911. The reversal of 971966899 is 998669179.

It is a strong prime.

It is an emirp because it is prime and its reverse (998669179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971966899 - 2⁷ = 971966771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 971966899.

It is not a weakly prime, because it can be changed into another prime (971966399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485983449 + 485983450.

It is an arithmetic number, because the mean of its divisors is an integer number (485983450).

Almost surely, 2^971966899 is an apocalyptic number.

971966899 is a deficient number, since it is larger than the sum of its proper divisors (1).

971966899 is an equidigital number, since it uses as much as digits as its factorization.

971966899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 64.

The square root of 971966899 is about 31176.3836741852. The cubic root of 971966899 is about 990.5669299838.

The spelling of 971966899 in words is "nine hundred seventy-one million, nine hundred sixty-six thousand, eight hundred ninety-nine".