505045399 has 2 divisors, whose sum is σ = 505045400. Its totient is φ = 505045398.

The previous prime is 505045379. The next prime is 505045423. The reversal of 505045399 is 993540505.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505045399 - 2²³ = 496656791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505045309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252522699 + 252522700.

It is an arithmetic number, because the mean of its divisors is an integer number (252522700).

Almost surely, 2^505045399 is an apocalyptic number.

505045399 is a deficient number, since it is larger than the sum of its proper divisors (1).

505045399 is an equidigital number, since it uses as much as digits as its factorization.

505045399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 121500, while the sum is 40.

The square root of 505045399 is about 22473.2151460355. The cubic root of 505045399 is about 796.3612867792.

The spelling of 505045399 in words is "five hundred five million, forty-five thousand, three hundred ninety-nine".