505654947 has 16 divisors (see below), whose sum is σ = 856135680. Its totient is φ = 288945576.

The previous prime is 505654921. The next prime is 505654949. The reversal of 505654947 is 749456505.

505654947 is a `hidden beast` number, since 5 + 0 + 565 + 49 + 47 = 666.

It is not a de Polignac number, because 505654947 - 2⁶ = 505654883 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (505654949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1337523 + ... + 1337900.

It is an arithmetic number, because the mean of its divisors is an integer number (53508480).

Almost surely, 2^505654947 is an apocalyptic number.

505654947 is a deficient number, since it is larger than the sum of its proper divisors (350480733).

505654947 is a wasteful number, since it uses less digits than its factorization.

505654947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675439 (or 2675433 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The square root of 505654947 is about 22486.7727119745. The cubic root of 505654947 is about 796.6815386971.

The spelling of 505654947 in words is "five hundred five million, six hundred fifty-four thousand, nine hundred forty-seven".