47783381 has 2 divisors, whose sum is σ = 47783382. Its totient is φ = 47783380.

The previous prime is 47783339. The next prime is 47783383. The reversal of 47783381 is 18338774.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41075281 + 6708100 = 6409^2 + 2590^2 .

It is a cyclic number.

It is not a de Polignac number, because 47783381 - 2¹⁸ = 47521237 is a prime.

It is a super-2 number, since 2×47783381² = 4566502999582322, which contains 22 as substring.

Together with 47783383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47783383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23891690 + 23891691.

It is an arithmetic number, because the mean of its divisors is an integer number (23891691).

Almost surely, 2^47783381 is an apocalyptic number.

It is an amenable number.

47783381 is a deficient number, since it is larger than the sum of its proper divisors (1).

47783381 is an equidigital number, since it uses as much as digits as its factorization.

47783381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 41.

The square root of 47783381 is about 6912.5524229477. The cubic root of 47783381 is about 362.8765957039.

The spelling of 47783381 in words is "forty-seven million, seven hundred eighty-three thousand, three hundred eighty-one".