47500009 has 2 divisors, whose sum is σ = 47500010. Its totient is φ = 47500008.

The previous prime is 47500003. The next prime is 47500039. The reversal of 47500009 is 90000574.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47224384 + 275625 = 6872^2 + 525^2 .

It is a cyclic number.

It is not a de Polignac number, because 47500009 - 2³ = 47500001 is a prime.

It is not a weakly prime, because it can be changed into another prime (47500001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23750004 + 23750005.

It is an arithmetic number, because the mean of its divisors is an integer number (23750005).

Almost surely, 2^47500009 is an apocalyptic number.

It is an amenable number.

47500009 is a deficient number, since it is larger than the sum of its proper divisors (1).

47500009 is an equidigital number, since it uses as much as digits as its factorization.

47500009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 47500009 is about 6892.0250289737. The cubic root of 47500009 is about 362.1578450452.

The spelling of 47500009 in words is "forty-seven million, five hundred thousand, nine".