505774397 has 2 divisors, whose sum is σ = 505774398. Its totient is φ = 505774396.

The previous prime is 505774351. The next prime is 505774403. The reversal of 505774397 is 793477505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 453732601 + 52041796 = 21301^2 + 7214^2 .

It is a cyclic number.

It is not a de Polignac number, because 505774397 - 2⁸ = 505774141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505774897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252887198 + 252887199.

It is an arithmetic number, because the mean of its divisors is an integer number (252887199).

Almost surely, 2^505774397 is an apocalyptic number.

It is an amenable number.

505774397 is a deficient number, since it is larger than the sum of its proper divisors (1).

505774397 is an equidigital number, since it uses as much as digits as its factorization.

505774397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 926100, while the sum is 47.

The square root of 505774397 is about 22489.4285609928. The cubic root of 505774397 is about 796.7442666621.

The spelling of 505774397 in words is "five hundred five million, seven hundred seventy-four thousand, three hundred ninety-seven".