505749189 has 16 divisors (see below), whose sum is σ = 755519040. Its totient is φ = 298229760.

The previous prime is 505749157. The next prime is 505749191. The reversal of 505749189 is 981947505.

It is not a de Polignac number, because 505749189 - 2⁵ = 505749157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505749289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205884 + ... + 208325.

It is an arithmetic number, because the mean of its divisors is an integer number (47219940).

Almost surely, 2^505749189 is an apocalyptic number.

It is an amenable number.

505749189 is a deficient number, since it is larger than the sum of its proper divisors (249769851).

505749189 is a wasteful number, since it uses less digits than its factorization.

505749189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414260.

The product of its (nonzero) digits is 453600, while the sum is 48.

The square root of 505749189 is about 22488.8681129131. The cubic root of 505749189 is about 796.7310297569.

The spelling of 505749189 in words is "five hundred five million, seven hundred forty-nine thousand, one hundred eighty-nine".