99838751 has 4 divisors (see below), whose sum is σ = 100090632. Its totient is φ = 99586872.

The previous prime is 99838747. The next prime is 99838757. The reversal of 99838751 is 15783899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15783899 = 2039 ⋅7741.

It is a cyclic number.

It is not a de Polignac number, because 99838751 - 2² = 99838747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99838751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99838757) 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, 125345 + ... + 126138.

It is an arithmetic number, because the mean of its divisors is an integer number (25022658).

Almost surely, 2^99838751 is an apocalyptic number.

99838751 is a deficient number, since it is larger than the sum of its proper divisors (251881).

99838751 is a wasteful number, since it uses less digits than its factorization.

99838751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251880.

The product of its digits is 544320, while the sum is 50.

The square root of 99838751 is about 9991.9342972219. The cubic root of 99838751 is about 463.9092652917.

The spelling of 99838751 in words is "ninety-nine million, eight hundred thirty-eight thousand, seven hundred fifty-one".