505640919 has 8 divisors (see below), whose sum is σ = 770500480. Its totient is φ = 288937656.

The previous prime is 505640909. The next prime is 505640923. The reversal of 505640919 is 919046505.

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

It is not a de Polignac number, because 505640919 - 2⁷ = 505640791 is a prime.

It is a super-2 number, since 2×505640919² = 511345477934329122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505640909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12039049 + ... + 12039090.

It is an arithmetic number, because the mean of its divisors is an integer number (96312560).

Almost surely, 2^505640919 is an apocalyptic number.

505640919 is a deficient number, since it is larger than the sum of its proper divisors (264859561).

505640919 is a wasteful number, since it uses less digits than its factorization.

505640919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24078149.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 505640919 is about 22486.4607931084. The cubic root of 505640919 is about 796.6741713860.

The spelling of 505640919 in words is "five hundred five million, six hundred forty thousand, nine hundred nineteen".