506389145 has 4 divisors (see below), whose sum is σ = 607666980. Its totient is φ = 405111312.

The previous prime is 506389133. The next prime is 506389151. The reversal of 506389145 is 541983605.

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 152497801 + 353891344 = 12349^2 + 18812^2 .

It is a cyclic number.

It is not a de Polignac number, because 506389145 - 2⁸ = 506388889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50638910 + ... + 50638919.

It is an arithmetic number, because the mean of its divisors is an integer number (151916745).

Almost surely, 2^506389145 is an apocalyptic number.

It is an amenable number.

506389145 is a deficient number, since it is larger than the sum of its proper divisors (101277835).

506389145 is a wasteful number, since it uses less digits than its factorization.

506389145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101277834.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 506389145 is about 22503.0918986703. The cubic root of 506389145 is about 797.0669392730.

The spelling of 506389145 in words is "five hundred six million, three hundred eighty-nine thousand, one hundred forty-five".