505945439 has 8 divisors (see below), whose sum is σ = 520430592. Its totient is φ = 491583960.

The previous prime is 505945423. The next prime is 505945441. The reversal of 505945439 is 934549505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505945439 - 2⁴ = 505945423 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 505945439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505945039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22589 + ... + 39014.

It is an arithmetic number, because the mean of its divisors is an integer number (65053824).

Almost surely, 2^505945439 is an apocalyptic number.

505945439 is a deficient number, since it is larger than the sum of its proper divisors (14485153).

505945439 is a wasteful number, since it uses less digits than its factorization.

505945439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61837.

The product of its (nonzero) digits is 486000, while the sum is 44.

The square root of 505945439 is about 22493.2309595576. The cubic root of 505945439 is about 796.8340704524.

The spelling of 505945439 in words is "five hundred five million, nine hundred forty-five thousand, four hundred thirty-nine".