47275639 has 2 divisors, whose sum is σ = 47275640. Its totient is φ = 47275638.

The previous prime is 47275637. The next prime is 47275687. The reversal of 47275639 is 93657274.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47275639 - 2¹ = 47275637 is a prime.

Together with 47275637, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 47275595 and 47275604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47275637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23637819 + 23637820.

It is an arithmetic number, because the mean of its divisors is an integer number (23637820).

Almost surely, 2^47275639 is an apocalyptic number.

47275639 is a deficient number, since it is larger than the sum of its proper divisors (1).

47275639 is an equidigital number, since it uses as much as digits as its factorization.

47275639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 43.

The square root of 47275639 is about 6875.7282523381. The cubic root of 47275639 is about 361.5867178950.

The spelling of 47275639 in words is "forty-seven million, two hundred seventy-five thousand, six hundred thirty-nine".