47912009 has 2 divisors, whose sum is σ = 47912010. Its totient is φ = 47912008.

The previous prime is 47911991. The next prime is 47912027. The reversal of 47912009 is 90021974.

It is a balanced prime because it is at equal distance from previous prime (47911991) and next prime (47912027).

It can be written as a sum of positive squares in only one way, i.e., 44023225 + 3888784 = 6635^2 + 1972^2 .

It is a cyclic number.

It is not a de Polignac number, because 47912009 - 2¹⁶ = 47846473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47912099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23956004 + 23956005.

It is an arithmetic number, because the mean of its divisors is an integer number (23956005).

Almost surely, 2^47912009 is an apocalyptic number.

It is an amenable number.

47912009 is a deficient number, since it is larger than the sum of its proper divisors (1).

47912009 is an equidigital number, since it uses as much as digits as its factorization.

47912009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 47912009 is about 6921.8501139507. The cubic root of 47912009 is about 363.2019129297.

The spelling of 47912009 in words is "forty-seven million, nine hundred twelve thousand, nine".