98057721 has 4 divisors (see below), whose sum is σ = 130743632. Its totient is φ = 65371812.

The previous prime is 98057719. The next prime is 98057731. The reversal of 98057721 is 12775089.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12775089 = 3 ⋅4258363.

It is not a de Polignac number, because 98057721 - 2¹ = 98057719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 98057721.

It is not an unprimeable number, because it can be changed into a prime (98057711) 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, 16342951 + ... + 16342956.

It is an arithmetic number, because the mean of its divisors is an integer number (32685908).

Almost surely, 2^98057721 is an apocalyptic number.

It is an amenable number.

98057721 is a deficient number, since it is larger than the sum of its proper divisors (32685911).

98057721 is a wasteful number, since it uses less digits than its factorization.

98057721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32685910.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 98057721 is about 9902.4098582113. The cubic root of 98057721 is about 461.1341281049.

The spelling of 98057721 in words is "ninety-eight million, fifty-seven thousand, seven hundred twenty-one".