505992947 has 4 divisors (see below), whose sum is σ = 535757256. Its totient is φ = 476228640.

The previous prime is 505992941. The next prime is 505992967. The reversal of 505992947 is 749299505.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505992947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505992895 and 505992904.

It is not an unprimeable number, because it can be changed into a prime (505992941) 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 3 ways as a sum of consecutive naturals, for example, 14882129 + ... + 14882162.

It is an arithmetic number, because the mean of its divisors is an integer number (133939314).

Almost surely, 2^505992947 is an apocalyptic number.

505992947 is a deficient number, since it is larger than the sum of its proper divisors (29764309).

505992947 is a wasteful number, since it uses less digits than its factorization.

505992947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29764308.

The product of its (nonzero) digits is 1020600, while the sum is 50.

The square root of 505992947 is about 22494.2869858104. The cubic root of 505992947 is about 796.8590104330.

The spelling of 505992947 in words is "five hundred five million, nine hundred ninety-two thousand, nine hundred forty-seven".