405905941 has 4 divisors (see below), whose sum is σ = 463892512. Its totient is φ = 347919372.

The previous prime is 405905933. The next prime is 405905963. The reversal of 405905941 is 149509504.

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 405905941 - 2³ = 405905933 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 405905941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405915941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28993275 + ... + 28993288.

It is an arithmetic number, because the mean of its divisors is an integer number (115973128).

Almost surely, 2^405905941 is an apocalyptic number.

It is an amenable number.

405905941 is a deficient number, since it is larger than the sum of its proper divisors (57986571).

405905941 is an equidigital number, since it uses as much as digits as its factorization.

405905941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57986570.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 405905941 is about 20147.1075095161. The cubic root of 405905941 is about 740.4148763191.

The spelling of 405905941 in words is "four hundred five million, nine hundred five thousand, nine hundred forty-one".