99481 has 4 divisors (see below), whose sum is σ = 101412. Its totient is φ = 97552.
The previous prime is 99469. The next prime is 99487. The reversal of 99481 is 18499.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18499 = 13 ⋅1423.
It can be written as a sum of positive squares in 2 ways, for example, as 67081 + 32400 = 259^2 + 180^2 .
It is a cyclic number.
It is not a de Polignac number, because 99481 - 215 = 66713 is a prime.
It is a super-2 number, since 2×994812 = 19792938722, which contains 22 as substring.
It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (99487) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 886 + ... + 991.
It is an arithmetic number, because the mean of its divisors is an integer number (25353).
299481 is an apocalyptic number.
It is an amenable number.
99481 is a deficient number, since it is larger than the sum of its proper divisors (1931).
99481 is a wasteful number, since it uses less digits than its factorization.
It is an anagram of its base 16 representation: 99481 = (18499)16.
99481 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1930.
The product of its digits is 2592, while the sum is 31.
The square root of 99481 is about 315.4060874492. The cubic root of 99481 is about 46.3354495293.
The spelling of 99481 in words is "ninety-nine thousand, four hundred eighty-one".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.064 sec. • engine limits •