98861909 has 4 divisors (see below), whose sum is σ = 98997516. Its totient is φ = 98726304.

The previous prime is 98861897. The next prime is 98861941. The reversal of 98861909 is 90916889.

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 74822500 + 24039409 = 8650^2 + 4903^2 .

It is a de Polignac number, because none of the positive numbers 2^k-98861909 is a prime.

It is a super-2 number, since 2×98861909² = 19547354102248562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98861969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66704 + ... + 68169.

It is an arithmetic number, because the mean of its divisors is an integer number (24749379).

Almost surely, 2^98861909 is an apocalyptic number.

It is an amenable number.

98861909 is a deficient number, since it is larger than the sum of its proper divisors (135607).

98861909 is a wasteful number, since it uses less digits than its factorization.

98861909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135606.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 98861909 is about 9942.9326156824. The cubic root of 98861909 is about 462.3913106173.

The spelling of 98861909 in words is "ninety-eight million, eight hundred sixty-one thousand, nine hundred nine".