505420289 has 8 divisors (see below), whose sum is σ = 552874368. Its totient is φ = 458217360.

The previous prime is 505420271. The next prime is 505420297. The reversal of 505420289 is 982024505.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505420289 - 2¹² = 505416193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505420229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58562 + ... + 66635.

It is an arithmetic number, because the mean of its divisors is an integer number (69109296).

Almost surely, 2^505420289 is an apocalyptic number.

It is an amenable number.

505420289 is a deficient number, since it is larger than the sum of its proper divisors (47454079).

505420289 is a wasteful number, since it uses less digits than its factorization.

505420289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125575.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 505420289 is about 22481.5544168992. The cubic root of 505420289 is about 796.5582816396.

The spelling of 505420289 in words is "five hundred five million, four hundred twenty thousand, two hundred eighty-nine".