505318874 has 4 divisors (see below), whose sum is σ = 757978314. Its totient is φ = 252659436.

The previous prime is 505318873. The next prime is 505318951. The reversal of 505318874 is 478813505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 478813505 = 5 ⋅95762701.

It can be written as a sum of positive squares in only one way, i.e., 362635849 + 142683025 = 19043^2 + 11945^2 .

It is not an unprimeable number, because it can be changed into a prime (505318871) 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 as a sum of consecutive naturals, namely, 126329717 + ... + 126329720.

Almost surely, 2^505318874 is an apocalyptic number.

505318874 is a deficient number, since it is larger than the sum of its proper divisors (252659440).

505318874 is a wasteful number, since it uses less digits than its factorization.

505318874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252659439.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 505318874 is about 22479.2987879960. The cubic root of 505318874 is about 796.5050003318.

The spelling of 505318874 in words is "five hundred five million, three hundred eighteen thousand, eight hundred seventy-four".