98687909 has 4 divisors (see below), whose sum is σ = 98721804. Its totient is φ = 98654016.

The previous prime is 98687893. The next prime is 98687923. The reversal of 98687909 is 90978689.

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 81902500 + 16785409 = 9050^2 + 4097^2 .

It is a cyclic number.

It is not a de Polignac number, because 98687909 - 2⁴ = 98687893 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 (98687959) 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, 12122 + ... + 18555.

It is an arithmetic number, because the mean of its divisors is an integer number (24680451).

Almost surely, 2^98687909 is an apocalyptic number.

It is an amenable number.

98687909 is a deficient number, since it is larger than the sum of its proper divisors (33895).

98687909 is a wasteful number, since it uses less digits than its factorization.

98687909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33894.

The product of its (nonzero) digits is 1959552, while the sum is 56.

The square root of 98687909 is about 9934.1788286702. The cubic root of 98687909 is about 462.1198770025.

The spelling of 98687909 in words is "ninety-eight million, six hundred eighty-seven thousand, nine hundred nine".