99409751 has 8 divisors (see below), whose sum is σ = 113718144. Its totient is φ = 85128120.

The previous prime is 99409733. The next prime is 99409759. The reversal of 99409751 is 15790499.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99409751 - 2¹⁴ = 99393367 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 (99409759) 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 7 ways as a sum of consecutive naturals, for example, 2036 + ... + 14246.

It is an arithmetic number, because the mean of its divisors is an integer number (14214768).

Almost surely, 2^99409751 is an apocalyptic number.

99409751 is the 8141-st pentagonal number.

99409751 is a deficient number, since it is larger than the sum of its proper divisors (14308393).

99409751 is a wasteful number, since it uses less digits than its factorization.

99409751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13381.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 99409751 is about 9970.4438717642. The cubic root of 99409751 is about 463.2438496112.

It can be divided in two parts, 9940 and 9751, that added together give a palindrome (19691).

The spelling of 99409751 in words is "ninety-nine million, four hundred nine thousand, seven hundred fifty-one".