505744457 has 4 divisors (see below), whose sum is σ = 517506000. Its totient is φ = 493982916.

The previous prime is 505744429. The next prime is 505744469. The reversal of 505744457 is 754447505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505744457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505749457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5880707 + ... + 5880792.

It is an arithmetic number, because the mean of its divisors is an integer number (129376500).

Almost surely, 2^505744457 is an apocalyptic number.

It is an amenable number.

505744457 is a deficient number, since it is larger than the sum of its proper divisors (11761543).

505744457 is a wasteful number, since it uses less digits than its factorization.

505744457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11761542.

The product of its (nonzero) digits is 392000, while the sum is 41.

The square root of 505744457 is about 22488.7629050599. The cubic root of 505744457 is about 796.7285449001.

The spelling of 505744457 in words is "five hundred five million, seven hundred forty-four thousand, four hundred fifty-seven".