47945239 has 2 divisors, whose sum is σ = 47945240. Its totient is φ = 47945238.

The previous prime is 47945203. The next prime is 47945291. The reversal of 47945239 is 93254974.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47945239 - 2¹¹ = 47943191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47945195 and 47945204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47945539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23972619 + 23972620.

It is an arithmetic number, because the mean of its divisors is an integer number (23972620).

Almost surely, 2^47945239 is an apocalyptic number.

47945239 is a deficient number, since it is larger than the sum of its proper divisors (1).

47945239 is an equidigital number, since it uses as much as digits as its factorization.

47945239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 43.

The square root of 47945239 is about 6924.2500676969. The cubic root of 47945239 is about 363.2858613360.

It can be divided in two parts, 47945 and 239, that added together give a palindrome (48184).

The spelling of 47945239 in words is "forty-seven million, nine hundred forty-five thousand, two hundred thirty-nine".