47838709 has 2 divisors, whose sum is σ = 47838710. Its totient is φ = 47838708.

The previous prime is 47838667. The next prime is 47838727. The reversal of 47838709 is 90783874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40832100 + 7006609 = 6390^2 + 2647^2 .

It is a cyclic number.

It is not a de Polignac number, because 47838709 - 2¹⁵ = 47805941 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47838779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23919354 + 23919355.

It is an arithmetic number, because the mean of its divisors is an integer number (23919355).

Almost surely, 2^47838709 is an apocalyptic number.

It is an amenable number.

47838709 is a deficient number, since it is larger than the sum of its proper divisors (1).

47838709 is an equidigital number, since it uses as much as digits as its factorization.

47838709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 47838709 is about 6916.5532601145. The cubic root of 47838709 is about 363.0165989976.

The spelling of 47838709 in words is "forty-seven million, eight hundred thirty-eight thousand, seven hundred nine".