99957589 has 4 divisors (see below), whose sum is σ = 101596300. Its totient is φ = 98318880.

The previous prime is 99957587. The next prime is 99957593. The reversal of 99957589 is 98575999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98575999 = 23 ⋅4285913.

It can be written as a sum of positive squares in 2 ways, for example, as 25704900 + 74252689 = 5070^2 + 8617^2 .

It is a cyclic number.

It is not a de Polignac number, because 99957589 - 2¹ = 99957587 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (61), and also a Moran number because the ratio is a prime number: 1638649 = 99957589 / (9 + 9 + 9 + 5 + 7 + 5 + 8 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99957587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 819264 + ... + 819385.

It is an arithmetic number, because the mean of its divisors is an integer number (25399075).

Almost surely, 2^99957589 is an apocalyptic number.

It is an amenable number.

99957589 is a deficient number, since it is larger than the sum of its proper divisors (1638711).

99957589 is a wasteful number, since it uses less digits than its factorization.

99957589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638710.

The product of its digits is 9185400, while the sum is 61.

The square root of 99957589 is about 9997.8792251157. The cubic root of 99957589 is about 464.0932559413.

The spelling of 99957589 in words is "ninety-nine million, nine hundred fifty-seven thousand, five hundred eighty-nine".