71444381 has 2 divisors, whose sum is σ = 71444382. Its totient is φ = 71444380.

The previous prime is 71444341. The next prime is 71444393. The reversal of 71444381 is 18344417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62647225 + 8797156 = 7915^2 + 2966^2 .

It is a cyclic number.

It is not a de Polignac number, because 71444381 - 2¹⁰ = 71443357 is a prime.

It is a super-2 number, since 2×71444381² = 10208599152946322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71444341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35722190 + 35722191.

It is an arithmetic number, because the mean of its divisors is an integer number (35722191).

Almost surely, 2^71444381 is an apocalyptic number.

It is an amenable number.

71444381 is a deficient number, since it is larger than the sum of its proper divisors (1).

71444381 is an equidigital number, since it uses as much as digits as its factorization.

71444381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 32.

The square root of 71444381 is about 8452.4778023962. The cubic root of 71444381 is about 414.9438758959.

Adding to 71444381 its reverse (18344417), we get a palindrome (89788798).

The spelling of 71444381 in words is "seventy-one million, four hundred forty-four thousand, three hundred eighty-one".