98724191 has 4 divisors (see below), whose sum is σ = 98777712. Its totient is φ = 98670672.

The previous prime is 98724163. The next prime is 98724193. The reversal of 98724191 is 19142789.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19142789 = 647 ⋅29587.

It is a cyclic number.

It is not a de Polignac number, because 98724191 - 2⁶ = 98724127 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 (98724193) 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, 23891 + ... + 27716.

It is an arithmetic number, because the mean of its divisors is an integer number (24694428).

Almost surely, 2^98724191 is an apocalyptic number.

98724191 is a deficient number, since it is larger than the sum of its proper divisors (53521).

98724191 is a wasteful number, since it uses less digits than its factorization.

98724191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53520.

The product of its digits is 36288, while the sum is 41.

The square root of 98724191 is about 9936.0047805947. The cubic root of 98724191 is about 462.1765019030.

The spelling of 98724191 in words is "ninety-eight million, seven hundred twenty-four thousand, one hundred ninety-one".