47886409 has 2 divisors, whose sum is σ = 47886410. Its totient is φ = 47886408.

The previous prime is 47886389. The next prime is 47886427. The reversal of 47886409 is 90468874.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47886400 + 9 = 6920^2 + 3^2 .

It is a cyclic number.

It is not a de Polignac number, because 47886409 - 2¹⁹ = 47362121 is a prime.

It is not a weakly prime, because it can be changed into another prime (47886499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23943204 + 23943205.

It is an arithmetic number, because the mean of its divisors is an integer number (23943205).

Almost surely, 2^47886409 is an apocalyptic number.

It is an amenable number.

47886409 is a deficient number, since it is larger than the sum of its proper divisors (1).

47886409 is an equidigital number, since it uses as much as digits as its factorization.

47886409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 47886409 is about 6920.0006502890. Note that the first 3 decimals coincide. The cubic root of 47886409 is about 363.1372135940.

The spelling of 47886409 in words is "forty-seven million, eight hundred eighty-six thousand, four hundred nine".