47709947 has 2 divisors, whose sum is σ = 47709948. Its totient is φ = 47709946.

The previous prime is 47709923. The next prime is 47709967. The reversal of 47709947 is 74990774.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47709947 - 2¹² = 47705851 is a prime.

It is not a weakly prime, because it can be changed into another prime (47709967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23854973 + 23854974.

It is an arithmetic number, because the mean of its divisors is an integer number (23854974).

Almost surely, 2^47709947 is an apocalyptic number.

47709947 is a deficient number, since it is larger than the sum of its proper divisors (1).

47709947 is an equidigital number, since it uses as much as digits as its factorization.

47709947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 444528, while the sum is 47.

The square root of 47709947 is about 6907.2387391779. The cubic root of 47709947 is about 362.6906095462.

The spelling of 47709947 in words is "forty-seven million, seven hundred nine thousand, nine hundred forty-seven".