99538541 has 4 divisors (see below), whose sum is σ = 99577500. Its totient is φ = 99499584.

The previous prime is 99538531. The next prime is 99538559. The reversal of 99538541 is 14583599.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14364100 + 85174441 = 3790^2 + 9229^2 .

It is a cyclic number.

It is not a de Polignac number, because 99538541 - 2⁶ = 99538477 is a prime.

It is a super-2 number, since 2×99538541² = 19815842288817362, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99538492 and 99538501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99538501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15356 + ... + 20853.

It is an arithmetic number, because the mean of its divisors is an integer number (24894375).

Almost surely, 2^99538541 is an apocalyptic number.

It is an amenable number.

99538541 is a deficient number, since it is larger than the sum of its proper divisors (38959).

99538541 is a wasteful number, since it uses less digits than its factorization.

99538541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38958.

The product of its digits is 194400, while the sum is 44.

The square root of 99538541 is about 9976.9003703555. The cubic root of 99538541 is about 463.4438146673.

The spelling of 99538541 in words is "ninety-nine million, five hundred thirty-eight thousand, five hundred forty-one".