99999238 has 4 divisors (see below), whose sum is σ = 149998860. Its totient is φ = 49999618.

The previous prime is 99999217. The next prime is 99999247. The reversal of 99999238 is 83299999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83299999 = 1217 ⋅68447.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24999808 + ... + 24999811.

It is an arithmetic number, because the mean of its divisors is an integer number (37499715).

Almost surely, 2^99999238 is an apocalyptic number.

99999238 is a deficient number, since it is larger than the sum of its proper divisors (49999622).

99999238 is a wasteful number, since it uses less digits than its factorization.

99999238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49999621.

The product of its digits is 2834352, while the sum is 58.

The square root of 99999238 is about 9999.9618999274. The cubic root of 99999238 is about 464.1577043947.

The spelling of 99999238 in words is "ninety-nine million, nine hundred ninety-nine thousand, two hundred thirty-eight".