505440007 has 2 divisors, whose sum is σ = 505440008. Its totient is φ = 505440006.

The previous prime is 505439993. The next prime is 505440011. The reversal of 505440007 is 700044505.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505440007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505441007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252720003 + 252720004.

It is an arithmetic number, because the mean of its divisors is an integer number (252720004).

Almost surely, 2^505440007 is an apocalyptic number.

505440007 is a deficient number, since it is larger than the sum of its proper divisors (1).

505440007 is an equidigital number, since it uses as much as digits as its factorization.

505440007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 505440007 is about 22481.9929499144. The cubic root of 505440007 is about 796.5686402344.

The spelling of 505440007 in words is "five hundred five million, four hundred forty thousand, seven".