99751 has 4 divisors (see below), whose sum is σ = 104112. Its totient is φ = 95392.

The previous prime is 99733. The next prime is 99761. The reversal of 99751 is 15799.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99751 - 2⁵ = 99719 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99721) 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, 2146 + ... + 2191.

It is an arithmetic number, because the mean of its divisors is an integer number (26028).

2⁹⁹⁷⁵¹ is an apocalyptic number.

99751 is a deficient number, since it is larger than the sum of its proper divisors (4361).

99751 is a wasteful number, since it uses less digits than its factorization.

99751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4360.

The product of its digits is 2835, while the sum is 31.

The square root of 99751 is about 315.8338170621. The cubic root of 99751 is about 46.3773311286.

The spelling of 99751 in words is "ninety-nine thousand, seven hundred fifty-one".