47516509 has 2 divisors, whose sum is σ = 47516510. Its totient is φ = 47516508.

The previous prime is 47516489. The next prime is 47516519. The reversal of 47516509 is 90561574.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30525625 + 16990884 = 5525^2 + 4122^2 .

It is a cyclic number.

It is not a de Polignac number, because 47516509 - 2¹⁵ = 47483741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47516519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23758254 + 23758255.

It is an arithmetic number, because the mean of its divisors is an integer number (23758255).

Almost surely, 2^47516509 is an apocalyptic number.

It is an amenable number.

47516509 is a deficient number, since it is larger than the sum of its proper divisors (1).

47516509 is an equidigital number, since it uses as much as digits as its factorization.

47516509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 47516509 is about 6893.2219607380. The cubic root of 47516509 is about 362.1997742489.

The spelling of 47516509 in words is "forty-seven million, five hundred sixteen thousand, five hundred nine".