505313279 has 2 divisors, whose sum is σ = 505313280. Its totient is φ = 505313278.

The previous prime is 505313273. The next prime is 505313293. The reversal of 505313279 is 972313505.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505313279 - 2¹² = 505309183 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505313273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252656639 + 252656640.

It is an arithmetic number, because the mean of its divisors is an integer number (252656640).

Almost surely, 2^505313279 is an apocalyptic number.

505313279 is a deficient number, since it is larger than the sum of its proper divisors (1).

505313279 is an equidigital number, since it uses as much as digits as its factorization.

505313279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28350, while the sum is 35.

The square root of 505313279 is about 22479.1743398195. The cubic root of 505313279 is about 796.5020606290.

The spelling of 505313279 in words is "five hundred five million, three hundred thirteen thousand, two hundred seventy-nine".