47449993 has 2 divisors, whose sum is σ = 47449994. Its totient is φ = 47449992.

The previous prime is 47449991. The next prime is 47450017. The reversal of 47449993 is 39994474.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42667024 + 4782969 = 6532^2 + 2187^2 .

It is a cyclic number.

It is not a de Polignac number, because 47449993 - 2¹ = 47449991 is a prime.

Together with 47449991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (47449991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23724996 + 23724997.

It is an arithmetic number, because the mean of its divisors is an integer number (23724997).

Almost surely, 2^47449993 is an apocalyptic number.

It is an amenable number.

47449993 is a deficient number, since it is larger than the sum of its proper divisors (1).

47449993 is an equidigital number, since it uses as much as digits as its factorization.

47449993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 49.

The square root of 47449993 is about 6888.3955316169. The cubic root of 47449993 is about 362.0306868362.

The spelling of 47449993 in words is "forty-seven million, four hundred forty-nine thousand, nine hundred ninety-three".