505091353 has 4 divisors (see below), whose sum is σ = 543944548. Its totient is φ = 466238160.

The previous prime is 505091351. The next prime is 505091381. The reversal of 505091353 is 353190505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 353190505 = 5 ⋅70638101.

It can be written as a sum of positive squares in 2 ways, for example, as 105411289 + 399680064 = 10267^2 + 19992^2 .

It is a cyclic number.

It is not a de Polignac number, because 505091353 - 2¹ = 505091351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505091351) 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, 19426578 + ... + 19426603.

It is an arithmetic number, because the mean of its divisors is an integer number (135986137).

Almost surely, 2^505091353 is an apocalyptic number.

It is an amenable number.

505091353 is a deficient number, since it is larger than the sum of its proper divisors (38853195).

505091353 is a wasteful number, since it uses less digits than its factorization.

505091353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38853194.

The product of its (nonzero) digits is 10125, while the sum is 31.

The square root of 505091353 is about 22474.2375399033. The cubic root of 505091353 is about 796.3854396420.

The spelling of 505091353 in words is "five hundred five million, ninety-one thousand, three hundred fifty-three".