501489999 has 12 divisors (see below), whose sum is σ = 755869296. Its totient is φ = 319790592.

The previous prime is 501489997. The next prime is 501490001. The reversal of 501489999 is 999984105.

501489999 is a `hidden beast` number, since 501 + 48 + 9 + 9 + 99 = 666.

It is an interprime number because it is at equal distance from previous prime (501489997) and next prime (501490001).

It is not a de Polignac number, because 501489999 - 2¹ = 501489997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501489997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1211122 + ... + 1211535.

It is an arithmetic number, because the mean of its divisors is an integer number (62989108).

Almost surely, 2^501489999 is an apocalyptic number.

501489999 is a deficient number, since it is larger than the sum of its proper divisors (254379297).

501489999 is a wasteful number, since it uses less digits than its factorization.

501489999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2422686 (or 2422683 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The square root of 501489999 is about 22393.9723809779. The cubic root of 501489999 is about 794.4881527860.

The spelling of 501489999 in words is "five hundred one million, four hundred eighty-nine thousand, nine hundred ninety-nine".