971111311 has 2 divisors, whose sum is σ = 971111312. Its totient is φ = 971111310.

The previous prime is 971111249. The next prime is 971111353. The reversal of 971111311 is 113111179.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 971111311 - 2⁹ = 971110799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971111711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485555655 + 485555656.

It is an arithmetic number, because the mean of its divisors is an integer number (485555656).

Almost surely, 2^971111311 is an apocalyptic number.

971111311 is a deficient number, since it is larger than the sum of its proper divisors (1).

971111311 is an equidigital number, since it uses as much as digits as its factorization.

971111311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189, while the sum is 25.

The square root of 971111311 is about 31162.6589205735. The cubic root of 971111311 is about 990.2761910087.

The spelling of 971111311 in words is "nine hundred seventy-one million, one hundred eleven thousand, three hundred eleven".