505655137 has 4 divisors (see below), whose sum is σ = 544551700. Its totient is φ = 466758576.

The previous prime is 505655077. The next prime is 505655141. The reversal of 505655137 is 731556505.

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

It can be written as a sum of positive squares in 2 ways, for example, as 320803921 + 184851216 = 17911^2 + 13596^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505655137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505655096 and 505655105.

It is not an unprimeable number, because it can be changed into a prime (505655237) 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, 19448262 + ... + 19448287.

It is an arithmetic number, because the mean of its divisors is an integer number (136137925).

Almost surely, 2^505655137 is an apocalyptic number.

It is an amenable number.

505655137 is a deficient number, since it is larger than the sum of its proper divisors (38896563).

505655137 is a wasteful number, since it uses less digits than its factorization.

505655137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38896562.

The product of its (nonzero) digits is 78750, while the sum is 37.

The square root of 505655137 is about 22486.7769366799. The cubic root of 505655137 is about 796.6816384816.

The spelling of 505655137 in words is "five hundred five million, six hundred fifty-five thousand, one hundred thirty-seven".