99281447 has 4 divisors (see below), whose sum is σ = 99301680. Its totient is φ = 99261216.

The previous prime is 99281423. The next prime is 99281477. The reversal of 99281447 is 74418299.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74418299 = 17 ⋅4377547.

It is a cyclic number.

It is not a de Polignac number, because 99281447 - 2⁶ = 99281383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99281398 and 99281407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99281407) 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, 2438 + ... + 14300.

It is an arithmetic number, because the mean of its divisors is an integer number (24825420).

Almost surely, 2^99281447 is an apocalyptic number.

99281447 is a deficient number, since it is larger than the sum of its proper divisors (20233).

99281447 is a wasteful number, since it uses less digits than its factorization.

99281447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20232.

The product of its digits is 145152, while the sum is 44.

The square root of 99281447 is about 9964.0075772753. The cubic root of 99281447 is about 463.0444673334.

The spelling of 99281447 in words is "ninety-nine million, two hundred eighty-one thousand, four hundred forty-seven".