9147997 has 6 divisors (see below), whose sum is σ = 9563582. Its totient is φ = 8749752.

The previous prime is 9147977. The next prime is 9148001. The reversal of 9147997 is 7997419.

It can be written as a sum of positive squares in only one way, i.e., 5503716 + 3644281 = 2346^2 + 1909^2 .

It is not a de Polignac number, because 9147997 - 2⁷ = 9147869 is a prime.

It is a super-2 number, since 2×9147997² = 167371698224018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9147907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8118 + ... + 9175.

Almost surely, 2^9147997 is an apocalyptic number.

It is an amenable number.

9147997 is a deficient number, since it is larger than the sum of its proper divisors (415585).

9147997 is a wasteful number, since it uses less digits than its factorization.

9147997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17339 (or 17316 counting only the distinct ones).

The product of its digits is 142884, while the sum is 46.

The square root of 9147997 is about 3024.5655886424. The cubic root of 9147997 is about 209.1423600657.

It can be divided in two parts, 914 and 7997, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 9147997 in words is "nine million, one hundred forty-seven thousand, nine hundred ninety-seven".