99897291 has 12 divisors (see below), whose sum is σ = 155395968. Its totient is φ = 61475184.

The previous prime is 99897289. The next prime is 99897313. The reversal of 99897291 is 19279899.

It is not a de Polignac number, because 99897291 - 2¹ = 99897289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99897241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 426795 + ... + 427028.

It is an arithmetic number, because the mean of its divisors is an integer number (12949664).

Almost surely, 2^99897291 is an apocalyptic number.

99897291 is a deficient number, since it is larger than the sum of its proper divisors (55498677).

99897291 is a wasteful number, since it uses less digits than its factorization.

99897291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853842 (or 853839 counting only the distinct ones).

The product of its digits is 734832, while the sum is 54.

The square root of 99897291 is about 9994.8632306800. The cubic root of 99897291 is about 463.9999179424. Note that the first 4 decimals are identical.

It can be divided in two parts, 998 and 97291, that added together give a palindrome (98289).

The spelling of 99897291 in words is "ninety-nine million, eight hundred ninety-seven thousand, two hundred ninety-one".