47994137 has 2 divisors, whose sum is σ = 47994138. Its totient is φ = 47994136.

The previous prime is 47994127. The next prime is 47994161. The reversal of 47994137 is 73149974.

It is a happy number.

47994137 is nontrivially palindromic in base 13.

47994137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44368921 + 3625216 = 6661^2 + 1904^2 .

It is a cyclic number.

It is not a de Polignac number, because 47994137 - 2²⁴ = 31216921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47994127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23997068 + 23997069.

It is an arithmetic number, because the mean of its divisors is an integer number (23997069).

Almost surely, 2^47994137 is an apocalyptic number.

It is an amenable number.

47994137 is a deficient number, since it is larger than the sum of its proper divisors (1).

47994137 is an equidigital number, since it uses as much as digits as its factorization.

47994137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 44.

The square root of 47994137 is about 6927.7800917754. The cubic root of 47994137 is about 363.4093210500.

The spelling of 47994137 in words is "forty-seven million, nine hundred ninety-four thousand, one hundred thirty-seven".