99438539 has 4 divisors (see below), whose sum is σ = 99489624. Its totient is φ = 99387456.

The previous prime is 99438529. The next prime is 99438589. The reversal of 99438539 is 93583499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93583499 = 59 ⋅1586161.

It is a cyclic number.

It is not a de Polignac number, because 99438539 - 2¹² = 99434443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99438529) 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, 22502 + ... + 26555.

It is an arithmetic number, because the mean of its divisors is an integer number (24872406).

Almost surely, 2^99438539 is an apocalyptic number.

99438539 is a deficient number, since it is larger than the sum of its proper divisors (51085).

99438539 is a wasteful number, since it uses less digits than its factorization.

99438539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51084.

The product of its digits is 1049760, while the sum is 50.

The square root of 99438539 is about 9971.8874341822. The cubic root of 99438539 is about 463.2885621158.

The spelling of 99438539 in words is "ninety-nine million, four hundred thirty-eight thousand, five hundred thirty-nine".