971938873 has 2 divisors, whose sum is σ = 971938874. Its totient is φ = 971938872.

The previous prime is 971938861. The next prime is 971938927. The reversal of 971938873 is 378839179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 957778704 + 14160169 = 30948^2 + 3763^2 .

It is an emirp because it is prime and its reverse (378839179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971938873 - 2²⁵ = 938384441 is a prime.

It is not a weakly prime, because it can be changed into another prime (971938823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485969436 + 485969437.

It is an arithmetic number, because the mean of its divisors is an integer number (485969437).

Almost surely, 2^971938873 is an apocalyptic number.

It is an amenable number.

971938873 is a deficient number, since it is larger than the sum of its proper divisors (1).

971938873 is an equidigital number, since it uses as much as digits as its factorization.

971938873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 55.

The square root of 971938873 is about 31175.9341961071. The cubic root of 971938873 is about 990.5574091192.

The spelling of 971938873 in words is "nine hundred seventy-one million, nine hundred thirty-eight thousand, eight hundred seventy-three".