47791309 has 16 divisors (see below), whose sum is σ = 51874560. Its totient is φ = 43908480.

The previous prime is 47791277. The next prime is 47791343. The reversal of 47791309 is 90319774.

It is a cyclic number.

It is not a de Polignac number, because 47791309 - 2⁵ = 47791277 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 (47791109) 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, 75424 + ... + 76054.

It is an arithmetic number, because the mean of its divisors is an integer number (3242160).

Almost surely, 2^47791309 is an apocalyptic number.

It is an amenable number.

47791309 is a deficient number, since it is larger than the sum of its proper divisors (4083251).

47791309 is a wasteful number, since it uses less digits than its factorization.

47791309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 47791309 is about 6913.1258487026. The cubic root of 47791309 is about 362.8966635357.

The spelling of 47791309 in words is "forty-seven million, seven hundred ninety-one thousand, three hundred nine".