100504955 has 4 divisors (see below), whose sum is σ = 120605952. Its totient is φ = 80403960.

The previous prime is 100504951. The next prime is 100504961. The reversal of 100504955 is 559405001.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 100504955 - 2² = 100504951 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100504951) 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, 10050491 + ... + 10050500.

It is an arithmetic number, because the mean of its divisors is an integer number (30151488).

Almost surely, 2^100504955 is an apocalyptic number.

100504955 is a deficient number, since it is larger than the sum of its proper divisors (20100997).

100504955 is an equidigital number, since it uses as much as digits as its factorization.

100504955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20100996.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 100504955 is about 10025.2159577737. The cubic root of 100504955 is about 464.9388365230.

Adding to 100504955 its reverse (559405001), we get a palindrome (659909956).

The spelling of 100504955 in words is "one hundred million, five hundred four thousand, nine hundred fifty-five".