98538561 has 12 divisors (see below), whose sum is σ = 155273040. Its totient is φ = 59720280.

The previous prime is 98538527. The next prime is 98538563. The reversal of 98538561 is 16583589.

98538561 is a `hidden beast` number, since 9 + 85 + 3 + 8 + 561 = 666.

It is not a de Polignac number, because 98538561 - 2¹⁵ = 98505793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (98538563) 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, 497571 + ... + 497768.

It is an arithmetic number, because the mean of its divisors is an integer number (12939420).

Almost surely, 2^98538561 is an apocalyptic number.

It is an amenable number.

98538561 is a deficient number, since it is larger than the sum of its proper divisors (56734479).

98538561 is a wasteful number, since it uses less digits than its factorization.

98538561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995356 (or 995353 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 98538561 is about 9926.6591056609. The cubic root of 98538561 is about 461.8866450408.

It can be divided in two parts, 98538 and 561, that added together give a palindrome (99099).

The spelling of 98538561 in words is "ninety-eight million, five hundred thirty-eight thousand, five hundred sixty-one".