47181377 has 2 divisors, whose sum is σ = 47181378. Its totient is φ = 47181376.

The previous prime is 47181367. The next prime is 47181383. The reversal of 47181377 is 77318174.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44209201 + 2972176 = 6649^2 + 1724^2 .

It is a cyclic number.

It is not a de Polignac number, because 47181377 - 2⁴ = 47181361 is a prime.

It is a super-2 number, since 2×47181377² = 4452164671232258, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47181377.

It is not a weakly prime, because it can be changed into another prime (47181367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23590688 + 23590689.

It is an arithmetic number, because the mean of its divisors is an integer number (23590689).

Almost surely, 2^47181377 is an apocalyptic number.

It is an amenable number.

47181377 is a deficient number, since it is larger than the sum of its proper divisors (1).

47181377 is an equidigital number, since it uses as much as digits as its factorization.

47181377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32928, while the sum is 38.

The square root of 47181377 is about 6868.8701399866. The cubic root of 47181377 is about 361.3462376948.

The spelling of 47181377 in words is "forty-seven million, one hundred eighty-one thousand, three hundred seventy-seven".