99989541 has 6 divisors (see below), whose sum is σ = 144429350. Its totient is φ = 66659688.

The previous prime is 99989537. The next prime is 99989543. The reversal of 99989541 is 14598999.

99989541 is a `hidden beast` number, since 9 + 9 + 98 + 9 + 541 = 666.

It can be written as a sum of positive squares in only one way, i.e., 94653441 + 5336100 = 9729^2 + 2310^2 .

It is not a de Polignac number, because 99989541 - 2² = 99989537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99989543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5554966 + ... + 5554983.

Almost surely, 2^99989541 is an apocalyptic number.

It is an amenable number.

99989541 is a deficient number, since it is larger than the sum of its proper divisors (44439809).

99989541 is a wasteful number, since it uses less digits than its factorization.

99989541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11109955 (or 11109952 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 54.

The square root of 99989541 is about 9999.4770363254. The cubic root of 99989541 is about 464.1427006712.

The spelling of 99989541 in words is "ninety-nine million, nine hundred eighty-nine thousand, five hundred forty-one".