99281791 has 12 divisors (see below), whose sum is σ = 115658928. Its totient is φ = 84975072.

The previous prime is 99281789. The next prime is 99281827. The reversal of 99281791 is 19718299.

It is a happy number.

It is not a de Polignac number, because 99281791 - 2¹ = 99281789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99281701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52830 + ... + 54676.

It is an arithmetic number, because the mean of its divisors is an integer number (9638244).

Almost surely, 2^99281791 is an apocalyptic number.

99281791 is a deficient number, since it is larger than the sum of its proper divisors (16377137).

99281791 is a wasteful number, since it uses less digits than its factorization.

99281791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2958 (or 2951 counting only the distinct ones).

The product of its digits is 81648, while the sum is 46.

The square root of 99281791 is about 9964.0248393910. The cubic root of 99281791 is about 463.0450021333.

The spelling of 99281791 in words is "ninety-nine million, two hundred eighty-one thousand, seven hundred ninety-one".