71228893 has 2 divisors, whose sum is σ = 71228894. Its totient is φ = 71228892.

The previous prime is 71228869. The next prime is 71228897. The reversal of 71228893 is 39882217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60186564 + 11042329 = 7758^2 + 3323^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71228893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71228897) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35614446 + 35614447.

It is an arithmetic number, because the mean of its divisors is an integer number (35614447).

Almost surely, 2^71228893 is an apocalyptic number.

It is an amenable number.

71228893 is a deficient number, since it is larger than the sum of its proper divisors (1).

71228893 is an equidigital number, since it uses as much as digits as its factorization.

71228893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 71228893 is about 8439.7211446824. The cubic root of 71228893 is about 414.5262761126.

The spelling of 71228893 in words is "seventy-one million, two hundred twenty-eight thousand, eight hundred ninety-three".