971411561 has 2 divisors, whose sum is σ = 971411562. Its totient is φ = 971411560.

The previous prime is 971411543. The next prime is 971411621. The reversal of 971411561 is 165114179.

971411561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 931165225 + 40246336 = 30515^2 + 6344^2 .

It is a cyclic number.

It is not a de Polignac number, because 971411561 - 2²² = 967217257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (971411261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485705780 + 485705781.

It is an arithmetic number, because the mean of its divisors is an integer number (485705781).

Almost surely, 2^971411561 is an apocalyptic number.

It is an amenable number.

971411561 is a deficient number, since it is larger than the sum of its proper divisors (1).

971411561 is an equidigital number, since it uses as much as digits as its factorization.

971411561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 35.

The square root of 971411561 is about 31167.4760126642. The cubic root of 971411561 is about 990.3782389701.

The spelling of 971411561 in words is "nine hundred seventy-one million, four hundred eleven thousand, five hundred sixty-one".