1499643909 has 16 divisors (see below), whose sum is σ = 2242081600. Its totient is φ = 990588528.

The previous prime is 1499643883. The next prime is 1499643923. The reversal of 1499643909 is 9093469941.

1499643909 is a `hidden beast` number, since 1 + 499 + 64 + 3 + 90 + 9 = 666.

It is not a de Polignac number, because 1499643909 - 2⁸ = 1499643653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1499643209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251839 + ... + 257724.

It is an arithmetic number, because the mean of its divisors is an integer number (140130100).

Almost surely, 2^1499643909 is an apocalyptic number.

It is an amenable number.

1499643909 is a deficient number, since it is larger than the sum of its proper divisors (742437691).

1499643909 is a wasteful number, since it uses less digits than its factorization.

1499643909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509681 (or 509675 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 54.

The square root of 1499643909 is about 38725.2360741674. The cubic root of 1499643909 is about 1144.6236526202.

The spelling of 1499643909 in words is "one billion, four hundred ninety-nine million, six hundred forty-three thousand, nine hundred nine".