8997420185 has 16 divisors (see below), whose sum is σ = 11846825424. Its totient is φ = 6518883072.

The previous prime is 8997420181. The next prime is 8997420239. The reversal of 8997420185 is 5810247998.

It can be written as a sum of positive squares in 8 ways, for example, as 899760016 + 8097660169 = 29996^2 + 89987^2 .

It is not a de Polignac number, because 8997420185 - 2² = 8997420181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8997420181) 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, 1302422 + ... + 1309311.

It is an arithmetic number, because the mean of its divisors is an integer number (740426589).

Almost surely, 2^8997420185 is an apocalyptic number.

It is an amenable number.

8997420185 is a deficient number, since it is larger than the sum of its proper divisors (2849405239).

8997420185 is a wasteful number, since it uses less digits than its factorization.

8997420185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611804.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The square root of 8997420185 is about 94854.7320116398. The cubic root of 8997420185 is about 2079.8850547458.

The spelling of 8997420185 in words is "eight billion, nine hundred ninety-seven million, four hundred twenty thousand, one hundred eighty-five".