8999541 has 24 divisors (see below), whose sum is σ = 13791960. Its totient is φ = 5651520.

The previous prime is 8999527. The next prime is 8999567. The reversal of 8999541 is 1459998.

It can be written as a sum of positive squares in 4 ways, for example, as 531441 + 8468100 = 729^2 + 2910^2 .

It is not a de Polignac number, because 8999541 - 2¹⁷ = 8868469 is a prime.

8999541 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8999581) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 219481 + ... + 219521.

It is an arithmetic number, because the mean of its divisors is an integer number (574665).

Almost surely, 2^8999541 is an apocalyptic number.

It is an amenable number.

8999541 is a deficient number, since it is larger than the sum of its proper divisors (4792419).

8999541 is an equidigital number, since it uses as much as digits as its factorization.

8999541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 73 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 8999541 is about 2999.9234990246. The cubic root of 8999541 is about 208.0048461026.

It can be divided in two parts, 899 and 9541, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 8999541 in words is "eight million, nine hundred ninety-nine thousand, five hundred forty-one".