506639749 has 16 divisors (see below), whose sum is σ = 636489216. Its totient is φ = 391762800.

The previous prime is 506639713. The next prime is 506639761. The reversal of 506639749 is 947936605.

It is not a de Polignac number, because 506639749 - 2⁷ = 506639621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506639149) 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, 15027 + ... + 35200.

It is an arithmetic number, because the mean of its divisors is an integer number (39780576).

Almost surely, 2^506639749 is an apocalyptic number.

It is an amenable number.

506639749 is a deficient number, since it is larger than the sum of its proper divisors (129849467).

506639749 is a wasteful number, since it uses less digits than its factorization.

506639749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50376.

The product of its (nonzero) digits is 1224720, while the sum is 49.

The square root of 506639749 is about 22508.6594225422. The cubic root of 506639749 is about 797.1984028740.

The spelling of 506639749 in words is "five hundred six million, six hundred thirty-nine thousand, seven hundred forty-nine".