505145437 has 4 divisors (see below), whose sum is σ = 505246716. Its totient is φ = 505044160.

The previous prime is 505145413. The next prime is 505145477. The reversal of 505145437 is 734541505.

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 180929401 + 324216036 = 13451^2 + 18006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505145437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505145477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42748 + ... + 53269.

It is an arithmetic number, because the mean of its divisors is an integer number (126311679).

Almost surely, 2^505145437 is an apocalyptic number.

It is an amenable number.

505145437 is a deficient number, since it is larger than the sum of its proper divisors (101279).

505145437 is an equidigital number, since it uses as much as digits as its factorization.

505145437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101278.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 505145437 is about 22475.4407520743. The cubic root of 505145437 is about 796.4138636572.

The spelling of 505145437 in words is "five hundred five million, one hundred forty-five thousand, four hundred thirty-seven".