99748121 has 8 divisors (see below), whose sum is σ = 111470688. Its totient is φ = 88468000.

The previous prime is 99748091. The next prime is 99748127. The reversal of 99748121 is 12184799.

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

It is a cyclic number.

It is not a de Polignac number, because 99748121 - 2⁶ = 99748057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99748127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110135 + ... + 111036.

It is an arithmetic number, because the mean of its divisors is an integer number (13933836).

Almost surely, 2^99748121 is an apocalyptic number.

It is an amenable number.

99748121 is a deficient number, since it is larger than the sum of its proper divisors (11722567).

99748121 is a wasteful number, since it uses less digits than its factorization.

99748121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221223.

The product of its digits is 36288, while the sum is 41.

The square root of 99748121 is about 9987.3981096179. The cubic root of 99748121 is about 463.7688494553.

The spelling of 99748121 in words is "ninety-nine million, seven hundred forty-eight thousand, one hundred twenty-one".