971231711 has 2 divisors, whose sum is σ = 971231712. Its totient is φ = 971231710.

The previous prime is 971231689. The next prime is 971231783. The reversal of 971231711 is 117132179.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971231711 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971201711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485615855 + 485615856.

It is an arithmetic number, because the mean of its divisors is an integer number (485615856).

Almost surely, 2^971231711 is an apocalyptic number.

971231711 is a deficient number, since it is larger than the sum of its proper divisors (1).

971231711 is an equidigital number, since it uses as much as digits as its factorization.

971231711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2646, while the sum is 32.

The square root of 971231711 is about 31164.5906599140. The cubic root of 971231711 is about 990.3171146821.

The spelling of 971231711 in words is "nine hundred seventy-one million, two hundred thirty-one thousand, seven hundred eleven".