505913697 has 12 divisors (see below), whose sum is σ = 732434560. Its totient is φ = 336504888.

The previous prime is 505913689. The next prime is 505913711. The reversal of 505913697 is 796319505.

505913697 is a `hidden beast` number, since 50 + 591 + 3 + 6 + 9 + 7 = 666.

It is not a de Polignac number, because 505913697 - 2³ = 505913689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505913657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60073 + ... + 67974.

Almost surely, 2^505913697 is an apocalyptic number.

It is an amenable number.

505913697 is a deficient number, since it is larger than the sum of its proper divisors (226520863).

505913697 is a wasteful number, since it uses less digits than its factorization.

505913697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128492 (or 128489 counting only the distinct ones).

The product of its (nonzero) digits is 255150, while the sum is 45.

The square root of 505913697 is about 22492.5253584385. The cubic root of 505913697 is about 796.8174061812.

The spelling of 505913697 in words is "five hundred five million, nine hundred thirteen thousand, six hundred ninety-seven".