997313471 has 16 divisors (see below), whose sum is σ = 1251763200. Its totient is φ = 771902880.

The previous prime is 997313417. The next prime is 997313489. The reversal of 997313471 is 174313799.

It is a de Polignac number, because none of the positive numbers 2^k-997313471 is a prime.

It is a super-4 number, since 4×997313471⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997313771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31991 + ... + 54936.

It is an arithmetic number, because the mean of its divisors is an integer number (78235200).

Almost surely, 2^997313471 is an apocalyptic number.

997313471 is a deficient number, since it is larger than the sum of its proper divisors (254449729).

997313471 is a wasteful number, since it uses less digits than its factorization.

997313471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87094.

The product of its digits is 142884, while the sum is 44.

The square root of 997313471 is about 31580.2702806673. The cubic root of 997313471 is about 999.1036871967.

The spelling of 997313471 in words is "nine hundred ninety-seven million, three hundred thirteen thousand, four hundred seventy-one".