98393721 has 16 divisors (see below), whose sum is σ = 137453568. Its totient is φ = 62528400.

The previous prime is 98393699. The next prime is 98393749. The reversal of 98393721 is 12739389.

It is not a de Polignac number, because 98393721 - 2⁵ = 98393689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (98393021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1665 + ... + 14126.

It is an arithmetic number, because the mean of its divisors is an integer number (8590848).

Almost surely, 2^98393721 is an apocalyptic number.

It is an amenable number.

98393721 is a deficient number, since it is larger than the sum of its proper divisors (39059847).

98393721 is a wasteful number, since it uses less digits than its factorization.

98393721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15892.

The product of its digits is 81648, while the sum is 42.

The square root of 98393721 is about 9919.3609169140. The cubic root of 98393721 is about 461.6602278698.

The spelling of 98393721 in words is "ninety-eight million, three hundred ninety-three thousand, seven hundred twenty-one".