997471151 has 4 divisors (see below), whose sum is σ = 997541832. Its totient is φ = 997400472.

The previous prime is 997471109. The next prime is 997471171. The reversal of 997471151 is 151174799.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 151174799 = 43 ⋅3515693.

It is a cyclic number.

It is not a de Polignac number, because 997471151 - 2¹⁸ = 997209007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997471171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6116 + ... + 45081.

It is an arithmetic number, because the mean of its divisors is an integer number (249385458).

Almost surely, 2^997471151 is an apocalyptic number.

997471151 is a deficient number, since it is larger than the sum of its proper divisors (70681).

997471151 is a wasteful number, since it uses less digits than its factorization.

997471151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70680.

The product of its digits is 79380, while the sum is 44.

The square root of 997471151 is about 31582.7666774144. The cubic root of 997471151 is about 999.1563387692.

The spelling of 997471151 in words is "nine hundred ninety-seven million, four hundred seventy-one thousand, one hundred fifty-one".