49272809 has 4 divisors (see below), whose sum is σ = 49298004. Its totient is φ = 49247616.

The previous prime is 49272791. The next prime is 49272823. The reversal of 49272809 is 90827294.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24720784 + 24552025 = 4972^2 + 4955^2 .

It is a cyclic number.

It is not a de Polignac number, because 49272809 - 2²⁰ = 48224233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (49272869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9392 + ... + 13665.

It is an arithmetic number, because the mean of its divisors is an integer number (12324501).

Almost surely, 2^49272809 is an apocalyptic number.

It is an amenable number.

49272809 is a deficient number, since it is larger than the sum of its proper divisors (25195).

49272809 is a wasteful number, since it uses less digits than its factorization.

49272809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25194.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 49272809 is about 7019.4593096620. The cubic root of 49272809 is about 366.6084244498.

The spelling of 49272809 in words is "forty-nine million, two hundred seventy-two thousand, eight hundred nine".