99209455 has 8 divisors (see below), whose sum is σ = 122891904. Its totient is φ = 76807200.

The previous prime is 99209449. The next prime is 99209491. The reversal of 99209455 is 55490299.

It is a happy number.

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

It is not a de Polignac number, because 99209455 - 2³ = 99209447 is a prime.

It is a super-2 number, since 2×99209455² = 19685031922794050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319876 + ... + 320185.

It is an arithmetic number, because the mean of its divisors is an integer number (15361488).

Almost surely, 2^99209455 is an apocalyptic number.

99209455 is a deficient number, since it is larger than the sum of its proper divisors (23682449).

99209455 is a wasteful number, since it uses less digits than its factorization.

99209455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640097.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 99209455 is about 9960.3943195036. The cubic root of 99209455 is about 462.9325177226.

The spelling of 99209455 in words is "ninety-nine million, two hundred nine thousand, four hundred fifty-five".