971243316 has 18 divisors (see below), whose sum is σ = 2455087362. Its totient is φ = 323747760.

The previous prime is 971243261. The next prime is 971243393. The reversal of 971243316 is 613342179.

It can be written as a sum of positive squares in only one way, i.e., 817731216 + 153512100 = 28596^2 + 12390^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 26978981 = 971243316 / (9 + 7 + 1 + 2 + 4 + 3 + 3 + 1 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13489455 + ... + 13489526.

Almost surely, 2^971243316 is an apocalyptic number.

It is an amenable number.

971243316 is an abundant number, since it is smaller than the sum of its proper divisors (1483844046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

971243316 is a wasteful number, since it uses less digits than its factorization.

971243316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26978991 (or 26978986 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 971243316 is about 31164.7768482304. The cubic root of 971243316 is about 990.3210590153.

The spelling of 971243316 in words is "nine hundred seventy-one million, two hundred forty-three thousand, three hundred sixteen".