749950809 has 16 divisors (see below), whose sum is σ = 1006200000. Its totient is φ = 496843776.

The previous prime is 749950807. The next prime is 749950813. The reversal of 749950809 is 908059947.

It is a happy number.

It is not a de Polignac number, because 749950809 - 2¹ = 749950807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (749950807) 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 15 ways as a sum of consecutive naturals, for example, 599817 + ... + 601065.

It is an arithmetic number, because the mean of its divisors is an integer number (62887500).

Almost surely, 2^749950809 is an apocalyptic number.

It is an amenable number.

749950809 is a deficient number, since it is larger than the sum of its proper divisors (256249191).

749950809 is a wasteful number, since it uses less digits than its factorization.

749950809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2344.

The product of its (nonzero) digits is 816480, while the sum is 51.

The square root of 749950809 is about 27385.2297598541. The cubic root of 749950809 is about 908.5404324309.

The spelling of 749950809 in words is "seven hundred forty-nine million, nine hundred fifty thousand, eight hundred nine".