504978749 has 4 divisors (see below), whose sum is σ = 550885920. Its totient is φ = 459071580.

The previous prime is 504978743. The next prime is 504978787. The reversal of 504978749 is 947879405.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 504978749 - 2²⁰ = 503930173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 504978749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (504978743) 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, 22953569 + ... + 22953590.

It is an arithmetic number, because the mean of its divisors is an integer number (137721480).

Almost surely, 2^504978749 is an apocalyptic number.

It is an amenable number.

504978749 is a deficient number, since it is larger than the sum of its proper divisors (45907171).

504978749 is a wasteful number, since it uses less digits than its factorization.

504978749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45907170.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The square root of 504978749 is about 22471.7322207257. The cubic root of 504978749 is about 796.3262537473.

The spelling of 504978749 in words is "five hundred four million, nine hundred seventy-eight thousand, seven hundred forty-nine".