971411621 has 2 divisors, whose sum is σ = 971411622. Its totient is φ = 971411620.

The previous prime is 971411561. The next prime is 971411663. The reversal of 971411621 is 126114179.

It is a happy number.

971411621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 968080996 + 3330625 = 31114^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 971411621 - 2¹⁰ = 971410597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971414621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485705810 + 485705811.

It is an arithmetic number, because the mean of its divisors is an integer number (485705811).

Almost surely, 2^971411621 is an apocalyptic number.

It is an amenable number.

971411621 is a deficient number, since it is larger than the sum of its proper divisors (1).

971411621 is an equidigital number, since it uses as much as digits as its factorization.

971411621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 32.

The square root of 971411621 is about 31167.4769752061. The cubic root of 971411621 is about 990.3782593606.

The spelling of 971411621 in words is "nine hundred seventy-one million, four hundred eleven thousand, six hundred twenty-one".