99438149 has 4 divisors (see below), whose sum is σ = 99478764. Its totient is φ = 99397536.

The previous prime is 99438139. The next prime is 99438197. The reversal of 99438149 is 94183499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94183499 = 439 ⋅214541.

It can be written as a sum of positive squares in 2 ways, for example, as 96393124 + 3045025 = 9818^2 + 1745^2 .

It is a cyclic number.

It is not a de Polignac number, because 99438149 - 2⁸ = 99437893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99438139) 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, 16382 + ... + 21615.

It is an arithmetic number, because the mean of its divisors is an integer number (24869691).

Almost surely, 2^99438149 is an apocalyptic number.

It is an amenable number.

99438149 is a deficient number, since it is larger than the sum of its proper divisors (40615).

99438149 is a wasteful number, since it uses less digits than its factorization.

99438149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40614.

The product of its digits is 279936, while the sum is 47.

The square root of 99438149 is about 9971.8678791889. The cubic root of 99438149 is about 463.2879564392.

The spelling of 99438149 in words is "ninety-nine million, four hundred thirty-eight thousand, one hundred forty-nine".