100509641 has 4 divisors (see below), whose sum is σ = 102648192. Its totient is φ = 98371092.

The previous prime is 100509637. The next prime is 100509653. The reversal of 100509641 is 146905001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146905001 = 31 ⋅4738871.

It is a cyclic number.

It is not a de Polignac number, because 100509641 - 2² = 100509637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100509641.

It is not an unprimeable number, because it can be changed into a prime (100509611) 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, 1069205 + ... + 1069298.

It is an arithmetic number, because the mean of its divisors is an integer number (25662048).

Almost surely, 2^100509641 is an apocalyptic number.

It is an amenable number.

100509641 is a deficient number, since it is larger than the sum of its proper divisors (2138551).

100509641 is an equidigital number, since it uses as much as digits as its factorization.

100509641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138550.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 100509641 is about 10025.4496657257. The cubic root of 100509641 is about 464.9460622680.

It can be divided in two parts, 10050 and 9641, that added together give a palindrome (19691).

The spelling of 100509641 in words is "one hundred million, five hundred nine thousand, six hundred forty-one".