505140347 has 2 divisors, whose sum is σ = 505140348. Its totient is φ = 505140346.

The previous prime is 505140343. The next prime is 505140463. The reversal of 505140347 is 743041505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505140347 - 2² = 505140343 is a prime.

It is not a weakly prime, because it can be changed into another prime (505140343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252570173 + 252570174.

It is an arithmetic number, because the mean of its divisors is an integer number (252570174).

Almost surely, 2^505140347 is an apocalyptic number.

505140347 is a deficient number, since it is larger than the sum of its proper divisors (1).

505140347 is an equidigital number, since it uses as much as digits as its factorization.

505140347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 505140347 is about 22475.3275170797. The cubic root of 505140347 is about 796.4111886783.

The spelling of 505140347 in words is "five hundred five million, one hundred forty thousand, three hundred forty-seven".