421186109 has 4 divisors (see below), whose sum is σ = 421228704. Its totient is φ = 421143516.

The previous prime is 421186093. The next prime is 421186127. The reversal of 421186109 is 901681124.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 421186109 - 2⁴ = 421186093 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 (421186009) 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, 2114 + ... + 29100.

It is an arithmetic number, because the mean of its divisors is an integer number (105307176).

Almost surely, 2^421186109 is an apocalyptic number.

It is an amenable number.

421186109 is a deficient number, since it is larger than the sum of its proper divisors (42595).

421186109 is a wasteful number, since it uses less digits than its factorization.

421186109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42594.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 421186109 is about 20522.8192264123. The cubic root of 421186109 is about 749.5915458903.

The spelling of 421186109 in words is "four hundred twenty-one million, one hundred eighty-six thousand, one hundred nine".