971313121 has 4 divisors (see below), whose sum is σ = 971640000. Its totient is φ = 970986244.

The previous prime is 971313103. The next prime is 971313127. The reversal of 971313121 is 121313179.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121313179 = 13 ⋅9331783.

It is a cyclic number.

It is not a de Polignac number, because 971313121 - 2¹⁷ = 971182049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 971313121.

It is not an unprimeable number, because it can be changed into a prime (971313127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158941 + ... + 164938.

It is an arithmetic number, because the mean of its divisors is an integer number (242910000).

Almost surely, 2^971313121 is an apocalyptic number.

It is an amenable number.

971313121 is a deficient number, since it is larger than the sum of its proper divisors (326879).

971313121 is a wasteful number, since it uses less digits than its factorization.

971313121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326878.

The product of its digits is 1134, while the sum is 28.

The square root of 971313121 is about 31165.8967623266. The cubic root of 971313121 is about 990.3447838308.

The spelling of 971313121 in words is "nine hundred seventy-one million, three hundred thirteen thousand, one hundred twenty-one".