100804621 has 4 divisors (see below), whose sum is σ = 100843200. Its totient is φ = 100766044.

The previous prime is 100804619. The next prime is 100804637. The reversal of 100804621 is 126408001.

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: 126408001 = 383 ⋅330047.

It is a cyclic number.

It is not a de Polignac number, because 100804621 - 2¹ = 100804619 is a prime.

It is a super-2 number, since 2×100804621² = 20323143229907282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100804592 and 100804601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100804601) 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, 15061 + ... + 20698.

It is an arithmetic number, because the mean of its divisors is an integer number (25210800).

Almost surely, 2^100804621 is an apocalyptic number.

It is an amenable number.

100804621 is a deficient number, since it is larger than the sum of its proper divisors (38579).

100804621 is an equidigital number, since it uses as much as digits as its factorization.

100804621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38578.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 100804621 is about 10040.1504470800. The cubic root of 100804621 is about 465.4004658967.

The spelling of 100804621 in words is "one hundred million, eight hundred four thousand, six hundred twenty-one".