971360981 has 2 divisors, whose sum is σ = 971360982. Its totient is φ = 971360980.

The previous prime is 971360969. The next prime is 971360987. The reversal of 971360981 is 189063179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 923612881 + 47748100 = 30391^2 + 6910^2 .

It is an emirp because it is prime and its reverse (189063179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971360981 - 2¹⁴ = 971344597 is a prime.

It is a super-2 number, since 2×971360981² = 1887084310818564722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971360987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485680490 + 485680491.

It is an arithmetic number, because the mean of its divisors is an integer number (485680491).

Almost surely, 2^971360981 is an apocalyptic number.

It is an amenable number.

971360981 is a deficient number, since it is larger than the sum of its proper divisors (1).

971360981 is an equidigital number, since it uses as much as digits as its factorization.

971360981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 971360981 is about 31166.6645793226. The cubic root of 971360981 is about 990.3610494825.

The spelling of 971360981 in words is "nine hundred seventy-one million, three hundred sixty thousand, nine hundred eighty-one".