99580394 has 16 divisors (see below), whose sum is σ = 155000328. Its totient is φ = 47941632.

The previous prime is 99580381. The next prime is 99580433. The reversal of 99580394 is 49308599.

It can be written as a sum of positive squares in 4 ways, for example, as 95316169 + 4264225 = 9763^2 + 2065^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 242 + ... + 14114.

Almost surely, 2^99580394 is an apocalyptic number.

99580394 is a deficient number, since it is larger than the sum of its proper divisors (55419934).

99580394 is a wasteful number, since it uses less digits than its factorization.

99580394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14009.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 99580394 is about 9978.9976450543. The cubic root of 99580394 is about 463.5087603518.

Adding to 99580394 its sum of digits (47), we get a square (99580441 = 9979²).

The spelling of 99580394 in words is "ninety-nine million, five hundred eighty thousand, three hundred ninety-four".