99993561 has 8 divisors (see below), whose sum is σ = 140341920. Its totient is φ = 63153792.

The previous prime is 99993527. The next prime is 99993583. The reversal of 99993561 is 16539999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99993561 - 2⁶ = 99993497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99993511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 877080 + ... + 877193.

It is an arithmetic number, because the mean of its divisors is an integer number (17542740).

Almost surely, 2^99993561 is an apocalyptic number.

It is an amenable number.

99993561 is a deficient number, since it is larger than the sum of its proper divisors (40348359).

99993561 is a wasteful number, since it uses less digits than its factorization.

99993561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1754295.

The product of its digits is 590490, while the sum is 51.

The square root of 99993561 is about 9999.6780448172. The cubic root of 99993561 is about 464.1489207506.

The spelling of 99993561 in words is "ninety-nine million, nine hundred ninety-three thousand, five hundred sixty-one".