9997155 has 64 divisors (see below), whose sum is σ = 20736000. Its totient is φ = 4475520.

The previous prime is 9997133. The next prime is 9997177. The reversal of 9997155 is 5517999.

It is an interprime number because it is at equal distance from previous prime (9997133) and next prime (9997177).

It is not a de Polignac number, because 9997155 - 2⁵ = 9997123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 9997155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 67021 + ... + 67169.

It is an arithmetic number, because the mean of its divisors is an integer number (324000).

Almost surely, 2^9997155 is an apocalyptic number.

9997155 is an abundant number, since it is smaller than the sum of its proper divisors (10738845).

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

9997155 is a wasteful number, since it uses less digits than its factorization.

9997155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 235 counting only the distinct ones).

The product of its digits is 127575, while the sum is 45.

The square root of 9997155 is about 3161.8277941722. The cubic root of 9997155 is about 215.4230358430.

The spelling of 9997155 in words is "nine million, nine hundred ninety-seven thousand, one hundred fifty-five".