409421881 has 4 divisors (see below), whose sum is σ = 446642064. Its totient is φ = 372201700.

The previous prime is 409421879. The next prime is 409421893. The reversal of 409421881 is 188124904.

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.

It is a cyclic number.

It is not a de Polignac number, because 409421881 - 2¹ = 409421879 is a prime.

It is a super-2 number, since 2×409421881² = 335252553283156322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 409421881.

It is not an unprimeable number, because it can be changed into a prime (409421801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18610075 + ... + 18610096.

It is an arithmetic number, because the mean of its divisors is an integer number (111660516).

Almost surely, 2^409421881 is an apocalyptic number.

It is an amenable number.

409421881 is a deficient number, since it is larger than the sum of its proper divisors (37220183).

409421881 is a wasteful number, since it uses less digits than its factorization.

409421881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37220182.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 409421881 is about 20234.1760642730. The cubic root of 409421881 is about 742.5465473583.

The spelling of 409421881 in words is "four hundred nine million, four hundred twenty-one thousand, eight hundred eighty-one".