99538619 has 4 divisors (see below), whose sum is σ = 99789744. Its totient is φ = 99287496.

The previous prime is 99538609. The next prime is 99538627. The reversal of 99538619 is 91683599.

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

It is a cyclic number.

It is not a de Polignac number, because 99538619 - 2⁴ = 99538603 is a prime.

It is a super-2 number, since 2×99538619² = 19815873344854322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99538609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124967 + ... + 125760.

It is an arithmetic number, because the mean of its divisors is an integer number (24947436).

Almost surely, 2^99538619 is an apocalyptic number.

99538619 is a deficient number, since it is larger than the sum of its proper divisors (251125).

99538619 is a wasteful number, since it uses less digits than its factorization.

99538619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251124.

The product of its digits is 524880, while the sum is 50.

The square root of 99538619 is about 9976.9042793845. The cubic root of 99538619 is about 463.4439357212.

The spelling of 99538619 in words is "ninety-nine million, five hundred thirty-eight thousand, six hundred nineteen".