505499939 has 8 divisors (see below), whose sum is σ = 579912960. Its totient is φ = 431636616.

The previous prime is 505499927. The next prime is 505499941. The reversal of 505499939 is 939994505.

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 505499939 - 2⁴ = 505499923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505499909) 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, 135449 + ... + 139130.

It is an arithmetic number, because the mean of its divisors is an integer number (72489120).

Almost surely, 2^505499939 is an apocalyptic number.

505499939 is a deficient number, since it is larger than the sum of its proper divisors (74413021).

505499939 is a wasteful number, since it uses less digits than its factorization.

505499939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274849.

The product of its (nonzero) digits is 1968300, while the sum is 53.

The square root of 505499939 is about 22483.3257993563. The cubic root of 505499939 is about 796.6001230772.

The spelling of 505499939 in words is "five hundred five million, four hundred ninety-nine thousand, nine hundred thirty-nine".