971247877 has 2 divisors, whose sum is σ = 971247878. Its totient is φ = 971247876.

The previous prime is 971247869. The next prime is 971247889. The reversal of 971247877 is 778742179.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 597753601 + 373494276 = 24449^2 + 19326^2 .

It is an emirp because it is prime and its reverse (778742179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971247877 - 2³ = 971247869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971247847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485623938 + 485623939.

It is an arithmetic number, because the mean of its divisors is an integer number (485623939).

Almost surely, 2^971247877 is an apocalyptic number.

It is an amenable number.

971247877 is a deficient number, since it is larger than the sum of its proper divisors (1).

971247877 is an equidigital number, since it uses as much as digits as its factorization.

971247877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1382976, while the sum is 52.

The square root of 971247877 is about 31164.8500237046. The cubic root of 971247877 is about 990.3226092095.

The spelling of 971247877 in words is "nine hundred seventy-one million, two hundred forty-seven thousand, eight hundred seventy-seven".