505135901 has 2 divisors, whose sum is σ = 505135902. Its totient is φ = 505135900.

The previous prime is 505135871. The next prime is 505135903. The reversal of 505135901 is 109531505.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 505080676 + 55225 = 22474^2 + 235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505135901 is a prime.

Together with 505135903, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505135903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252567950 + 252567951.

It is an arithmetic number, because the mean of its divisors is an integer number (252567951).

Almost surely, 2^505135901 is an apocalyptic number.

It is an amenable number.

505135901 is a deficient number, since it is larger than the sum of its proper divisors (1).

505135901 is an equidigital number, since it uses as much as digits as its factorization.

505135901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 505135901 is about 22475.2286084035. The cubic root of 505135901 is about 796.4088521299.

The spelling of 505135901 in words is "five hundred five million, one hundred thirty-five thousand, nine hundred one".