99581827 has 4 divisors (see below), whose sum is σ = 102794176. Its totient is φ = 96369480.

The previous prime is 99581821. The next prime is 99581863. The reversal of 99581827 is 72818599.

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

It is a cyclic number.

It is not a de Polignac number, because 99581827 - 2³ = 99581819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99581821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1606128 + ... + 1606189.

It is an arithmetic number, because the mean of its divisors is an integer number (25698544).

Almost surely, 2^99581827 is an apocalyptic number.

99581827 is a deficient number, since it is larger than the sum of its proper divisors (3212349).

99581827 is a wasteful number, since it uses less digits than its factorization.

99581827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212348.

The product of its digits is 362880, while the sum is 49.

The square root of 99581827 is about 9979.0694455946. The cubic root of 99581827 is about 463.5109836974.

The spelling of 99581827 in words is "ninety-nine million, five hundred eighty-one thousand, eight hundred twenty-seven".