47065309 has 2 divisors, whose sum is σ = 47065310. Its totient is φ = 47065308.

The previous prime is 47065279. The next prime is 47065321. The reversal of 47065309 is 90356074.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46539684 + 525625 = 6822^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 47065309 - 2¹³ = 47057117 is a prime.

It is a super-2 number, since 2×47065309² = 4430286622530962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47065009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23532654 + 23532655.

It is an arithmetic number, because the mean of its divisors is an integer number (23532655).

Almost surely, 2^47065309 is an apocalyptic number.

It is an amenable number.

47065309 is a deficient number, since it is larger than the sum of its proper divisors (1).

47065309 is an equidigital number, since it uses as much as digits as its factorization.

47065309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 47065309 is about 6860.4160952525. The cubic root of 47065309 is about 361.0496858431.

It can be divided in two parts, 47065 and 309, that added together give a palindrome (47374).

The spelling of 47065309 in words is "forty-seven million, sixty-five thousand, three hundred nine".