98993591 has 4 divisors (see below), whose sum is σ = 104203800. Its totient is φ = 93783384.

The previous prime is 98993569. The next prime is 98993593. The reversal of 98993591 is 19539989.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98993591 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 (98993593) 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, 2605076 + ... + 2605113.

It is an arithmetic number, because the mean of its divisors is an integer number (26050950).

Almost surely, 2^98993591 is an apocalyptic number.

98993591 is a deficient number, since it is larger than the sum of its proper divisors (5210209).

98993591 is a wasteful number, since it uses less digits than its factorization.

98993591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5210208.

The product of its digits is 787320, while the sum is 53.

The square root of 98993591 is about 9949.5523014857. The cubic root of 98993591 is about 462.5965180595.

The spelling of 98993591 in words is "ninety-eight million, nine hundred ninety-three thousand, five hundred ninety-one".