505720003 has 2 divisors, whose sum is σ = 505720004. Its totient is φ = 505720002.

The previous prime is 505719967. The next prime is 505720013. The reversal of 505720003 is 300027505.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505720003 is a prime.

It is not a weakly prime, because it can be changed into another prime (505720013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252860001 + 252860002.

It is an arithmetic number, because the mean of its divisors is an integer number (252860002).

Almost surely, 2^505720003 is an apocalyptic number.

505720003 is a deficient number, since it is larger than the sum of its proper divisors (1).

505720003 is an equidigital number, since it uses as much as digits as its factorization.

505720003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 505720003 is about 22488.2192047303. The cubic root of 505720003 is about 796.7157034254.

Adding to 505720003 its reverse (300027505), we get a palindrome (805747508).

The spelling of 505720003 in words is "five hundred five million, seven hundred twenty thousand, three".