99256009 has 4 divisors (see below), whose sum is σ = 102678660. Its totient is φ = 95833360.

The previous prime is 99256007. The next prime is 99256021. The reversal of 99256009 is 90065299.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90065299 = 433 ⋅208003.

It can be written as a sum of positive squares in 2 ways, for example, as 85155984 + 14100025 = 9228^2 + 3755^2 .

It is a cyclic number.

It is not a de Polignac number, because 99256009 - 2¹ = 99256007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99256007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1711282 + ... + 1711339.

It is an arithmetic number, because the mean of its divisors is an integer number (25669665).

Almost surely, 2^99256009 is an apocalyptic number.

It is an amenable number.

99256009 is a deficient number, since it is larger than the sum of its proper divisors (3422651).

99256009 is a wasteful number, since it uses less digits than its factorization.

99256009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422650.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 99256009 is about 9962.7310010860. The cubic root of 99256009 is about 463.0049167035.

The spelling of 99256009 in words is "ninety-nine million, two hundred fifty-six thousand, nine".