47071939 has 2 divisors, whose sum is σ = 47071940. Its totient is φ = 47071938.

The previous prime is 47071909. The next prime is 47071943. The reversal of 47071939 is 93917074.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47071939 - 2⁵ = 47071907 is a prime.

It is not a weakly prime, because it can be changed into another prime (47071909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23535969 + 23535970.

It is an arithmetic number, because the mean of its divisors is an integer number (23535970).

Almost surely, 2^47071939 is an apocalyptic number.

47071939 is a deficient number, since it is larger than the sum of its proper divisors (1).

47071939 is an equidigital number, since it uses as much as digits as its factorization.

47071939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 47071939 is about 6860.8992850792. The cubic root of 47071939 is about 361.0666385065.

The spelling of 47071939 in words is "forty-seven million, seventy-one thousand, nine hundred thirty-nine".