99898237 has 4 divisors (see below), whose sum is σ = 101266780. Its totient is φ = 98529696.

The previous prime is 99898217. The next prime is 99898247. The reversal of 99898237 is 73289899.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79049881 + 20848356 = 8891^2 + 4566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99898237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99898217) 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 3 ways as a sum of consecutive naturals, for example, 684162 + ... + 684307.

It is an arithmetic number, because the mean of its divisors is an integer number (25316695).

Almost surely, 2^99898237 is an apocalyptic number.

It is an amenable number.

99898237 is a deficient number, since it is larger than the sum of its proper divisors (1368543).

99898237 is a wasteful number, since it uses less digits than its factorization.

99898237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368542.

The product of its digits is 1959552, while the sum is 55.

The square root of 99898237 is about 9994.9105548774. The cubic root of 99898237 is about 464.0013825885.

It can be divided in two parts, 998 and 98237, that added together give a triangular number (99235 = T₄₄₅).

The spelling of 99898237 in words is "ninety-nine million, eight hundred ninety-eight thousand, two hundred thirty-seven".