505140999 has 12 divisors (see below), whose sum is σ = 740317368. Its totient is φ = 306145840.

The previous prime is 505140967. The next prime is 505141027. The reversal of 505140999 is 999041505.

It is a happy number.

It is not a de Polignac number, because 505140999 - 2⁵ = 505140967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505140999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505140919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 695424 + ... + 696149.

It is an arithmetic number, because the mean of its divisors is an integer number (61693114).

Almost surely, 2^505140999 is an apocalyptic number.

505140999 is a deficient number, since it is larger than the sum of its proper divisors (235176369).

505140999 is a wasteful number, since it uses less digits than its factorization.

505140999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391598 (or 1391587 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 42.

The square root of 505140999 is about 22475.3420218692. The cubic root of 505140999 is about 796.4115313288.

The spelling of 505140999 in words is "five hundred five million, one hundred forty thousand, nine hundred ninety-nine".