98993721 has 16 divisors (see below), whose sum is σ = 136745280. Its totient is φ = 63655680.

The previous prime is 98993701. The next prime is 98993729. The reversal of 98993721 is 12739989.

It is not a de Polignac number, because 98993721 - 2⁷ = 98993593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (98993729) 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, 6426 + ... + 15468.

It is an arithmetic number, because the mean of its divisors is an integer number (8546580).

Almost surely, 2^98993721 is an apocalyptic number.

It is an amenable number.

98993721 is a deficient number, since it is larger than the sum of its proper divisors (37751559).

98993721 is a wasteful number, since it uses less digits than its factorization.

98993721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9176.

The product of its digits is 244944, while the sum is 48.

The square root of 98993721 is about 9949.5588344409. The cubic root of 98993721 is about 462.5967205559.

The spelling of 98993721 in words is "ninety-eight million, nine hundred ninety-three thousand, seven hundred twenty-one".