505405049 has 2 divisors, whose sum is σ = 505405050. Its totient is φ = 505405048.

The previous prime is 505405037. The next prime is 505405057. The reversal of 505405049 is 940504505.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499835449 + 5569600 = 22357^2 + 2360^2 .

It is a cyclic number.

It is not a de Polignac number, because 505405049 - 2¹² = 505400953 is a prime.

It is a Chen prime.

It is equal to p_26625083 and since 505405049 and 26625083 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (505405079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252702524 + 252702525.

It is an arithmetic number, because the mean of its divisors is an integer number (252702525).

Almost surely, 2^505405049 is an apocalyptic number.

It is an amenable number.

505405049 is a deficient number, since it is larger than the sum of its proper divisors (1).

505405049 is an equidigital number, since it uses as much as digits as its factorization.

505405049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 505405049 is about 22481.2154698095. The cubic root of 505405049 is about 796.5502753192.

The spelling of 505405049 in words is "five hundred five million, four hundred five thousand, forty-nine".