98488721 has 4 divisors (see below), whose sum is σ = 98513844. Its totient is φ = 98463600.

The previous prime is 98488711. The next prime is 98488729. The reversal of 98488721 is 12788489.

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 40500496 + 57988225 = 6364^2 + 7615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98488721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98488729) 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, 5270 + ... + 14991.

It is an arithmetic number, because the mean of its divisors is an integer number (24628461).

Almost surely, 2^98488721 is an apocalyptic number.

It is an amenable number.

98488721 is a deficient number, since it is larger than the sum of its proper divisors (25123).

98488721 is a wasteful number, since it uses less digits than its factorization.

98488721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25122.

The product of its digits is 258048, while the sum is 47.

The square root of 98488721 is about 9924.1483765611. The cubic root of 98488721 is about 461.8087590761.

The spelling of 98488721 in words is "ninety-eight million, four hundred eighty-eight thousand, seven hundred twenty-one".