505469669 has 4 divisors (see below), whose sum is σ = 506244396. Its totient is φ = 504694944.

The previous prime is 505469659. The next prime is 505469677. The reversal of 505469669 is 966964505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 311981569 + 193488100 = 17663^2 + 13910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505469669 is a prime.

It is a super-2 number, since 2×505469669² = 510999172557939122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505469659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386384 + ... + 387689.

It is an arithmetic number, because the mean of its divisors is an integer number (126561099).

Almost surely, 2^505469669 is an apocalyptic number.

It is an amenable number.

505469669 is a deficient number, since it is larger than the sum of its proper divisors (774727).

505469669 is an equidigital number, since it uses as much as digits as its factorization.

505469669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774726.

The product of its (nonzero) digits is 1749600, while the sum is 50.

The square root of 505469669 is about 22482.6526237453. The cubic root of 505469669 is about 796.5842222728.

The spelling of 505469669 in words is "five hundred five million, four hundred sixty-nine thousand, six hundred sixty-nine".