100344421 has 4 divisors (see below), whose sum is σ = 106247052. Its totient is φ = 94441792.

The previous prime is 100344403. The next prime is 100344443. The reversal of 100344421 is 124443001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124443001 = 241 ⋅516361.

It can be written as a sum of positive squares in 2 ways, for example, as 90516196 + 9828225 = 9514^2 + 3135^2 .

It is a cyclic number.

It is not a de Polignac number, because 100344421 - 2⁹ = 100343909 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 (100344401) 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, 2951290 + ... + 2951323.

It is an arithmetic number, because the mean of its divisors is an integer number (26561763).

Almost surely, 2^100344421 is an apocalyptic number.

It is an amenable number.

100344421 is a deficient number, since it is larger than the sum of its proper divisors (5902631).

100344421 is an equidigital number, since it uses as much as digits as its factorization.

100344421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5902630.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 100344421 is about 10017.2062472528. The cubic root of 100344421 is about 464.6911596270.

Adding to 100344421 its reverse (124443001), we get a palindrome (224787422).

The spelling of 100344421 in words is "one hundred million, three hundred forty-four thousand, four hundred twenty-one".