971948899 has 2 divisors, whose sum is σ = 971948900. Its totient is φ = 971948898.

The previous prime is 971948863. The next prime is 971948969. The reversal of 971948899 is 998849179.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 971948899 - 2¹¹ = 971946851 is a prime.

It is a super-4 number, since 4×971948899⁴ (a number of 37 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 971948899.

It is not a weakly prime, because it can be changed into another prime (971948839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485974449 + 485974450.

It is an arithmetic number, because the mean of its divisors is an integer number (485974450).

Almost surely, 2^971948899 is an apocalyptic number.

971948899 is a deficient number, since it is larger than the sum of its proper divisors (1).

971948899 is an equidigital number, since it uses as much as digits as its factorization.

971948899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 64.

The square root of 971948899 is about 31176.0949927986. The cubic root of 971948899 is about 990.5608151271.

The spelling of 971948899 in words is "nine hundred seventy-one million, nine hundred forty-eight thousand, eight hundred ninety-nine".