99390506 has 8 divisors (see below), whose sum is σ = 150405444. Its totient is φ = 49255360.

The previous prime is 99390497. The next prime is 99390509. The reversal of 99390506 is 60509399.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 95746225 + 3644281 = 9785^2 + 1909^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99390509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219665 + ... + 220116.

Almost surely, 2^99390506 is an apocalyptic number.

99390506 is a deficient number, since it is larger than the sum of its proper divisors (51014938).

99390506 is a wasteful number, since it uses less digits than its factorization.

99390506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439896.

The product of its (nonzero) digits is 65610, while the sum is 41.

The square root of 99390506 is about 9969.4787225812. The cubic root of 99390506 is about 463.2139541427.

The spelling of 99390506 in words is "ninety-nine million, three hundred ninety thousand, five hundred six".