98724561 has 12 divisors (see below), whose sum is σ = 142537968. Its totient is φ = 60753264.

The previous prime is 98724541. The next prime is 98724617. The reversal of 98724561 is 16542789.

It is not a de Polignac number, because 98724561 - 2¹⁵ = 98691793 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (98724511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96855 + ... + 97868.

It is an arithmetic number, because the mean of its divisors is an integer number (11878164).

Almost surely, 2^98724561 is an apocalyptic number.

It is an amenable number.

98724561 is a deficient number, since it is larger than the sum of its proper divisors (43813407).

98724561 is a wasteful number, since it uses less digits than its factorization.

98724561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194752 (or 194739 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 98724561 is about 9936.0233997309. The cubic root of 98724561 is about 462.1770792863.

The spelling of 98724561 in words is "ninety-eight million, seven hundred twenty-four thousand, five hundred sixty-one".