47337781 has 2 divisors, whose sum is σ = 47337782. Its totient is φ = 47337780.

The previous prime is 47337779. The next prime is 47337793. The reversal of 47337781 is 18773374.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26780625 + 20557156 = 5175^2 + 4534^2 .

It is a cyclic number.

It is not a de Polignac number, because 47337781 - 2¹ = 47337779 is a prime.

It is a super-2 number, since 2×47337781² = 4481731020007922, which contains 22 as substring.

Together with 47337779, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47337751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23668890 + 23668891.

It is an arithmetic number, because the mean of its divisors is an integer number (23668891).

Almost surely, 2^47337781 is an apocalyptic number.

It is an amenable number.

47337781 is a deficient number, since it is larger than the sum of its proper divisors (1).

47337781 is an equidigital number, since it uses as much as digits as its factorization.

47337781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98784, while the sum is 40.

The square root of 47337781 is about 6880.2457078218. The cubic root of 47337781 is about 361.7450791165.

The spelling of 47337781 in words is "forty-seven million, three hundred thirty-seven thousand, seven hundred eighty-one".