405439349 has 4 divisors (see below), whose sum is σ = 463359264. Its totient is φ = 347519436.

The previous prime is 405439337. The next prime is 405439357. The reversal of 405439349 is 943934504.

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 405439349 - 2¹² = 405435253 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 (405439849) 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, 28959947 + ... + 28959960.

It is an arithmetic number, because the mean of its divisors is an integer number (115839816).

Almost surely, 2^405439349 is an apocalyptic number.

It is an amenable number.

405439349 is a deficient number, since it is larger than the sum of its proper divisors (57919915).

405439349 is an equidigital number, since it uses as much as digits as its factorization.

405439349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57919914.

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 405439349 is about 20135.5245523925. The cubic root of 405439349 is about 740.1310633452.

The spelling of 405439349 in words is "four hundred five million, four hundred thirty-nine thousand, three hundred forty-nine".