100505199 has 4 divisors (see below), whose sum is σ = 134006936. Its totient is φ = 67003464.

The previous prime is 100505191. The next prime is 100505219. The reversal of 100505199 is 991505001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991505001 = 3 ⋅330501667.

It is not a de Polignac number, because 100505199 - 2³ = 100505191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100505191) 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, 16750864 + ... + 16750869.

It is an arithmetic number, because the mean of its divisors is an integer number (33501734).

Almost surely, 2^100505199 is an apocalyptic number.

100505199 is a deficient number, since it is larger than the sum of its proper divisors (33501737).

100505199 is an equidigital number, since it uses as much as digits as its factorization.

100505199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33501736.

The product of its (nonzero) digits is 2025, while the sum is 30.

The square root of 100505199 is about 10025.2281270802. The cubic root of 100505199 is about 464.9392127731.

The spelling of 100505199 in words is "one hundred million, five hundred five thousand, one hundred ninety-nine".