99938751 has 16 divisors (see below), whose sum is σ = 148748160. Its totient is φ = 59159520.

The previous prime is 99938747. The next prime is 99938753. The reversal of 99938751 is 15783999.

It is a happy number.

It is not a de Polignac number, because 99938751 - 2² = 99938747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99938694 and 99938703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99938753) 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 15 ways as a sum of consecutive naturals, for example, 33796 + ... + 36633.

It is an arithmetic number, because the mean of its divisors is an integer number (9296760).

Almost surely, 2^99938751 is an apocalyptic number.

99938751 is a deficient number, since it is larger than the sum of its proper divisors (48809409).

99938751 is a wasteful number, since it uses less digits than its factorization.

99938751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70486.

The product of its digits is 612360, while the sum is 51.

The square root of 99938751 is about 9996.9370809263. The cubic root of 99938751 is about 464.0640997825.

The spelling of 99938751 in words is "ninety-nine million, nine hundred thirty-eight thousand, seven hundred fifty-one".