71448889 has 2 divisors, whose sum is σ = 71448890. Its totient is φ = 71448888.

The previous prime is 71448877. The next prime is 71448901. The reversal of 71448889 is 98884417.

It is a balanced prime because it is at equal distance from previous prime (71448877) and next prime (71448901).

It can be written as a sum of positive squares in only one way, i.e., 53173264 + 18275625 = 7292^2 + 4275^2 .

It is a cyclic number.

It is not a de Polignac number, because 71448889 - 2²³ = 63060281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71448859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35724444 + 35724445.

It is an arithmetic number, because the mean of its divisors is an integer number (35724445).

Almost surely, 2^71448889 is an apocalyptic number.

It is an amenable number.

71448889 is a deficient number, since it is larger than the sum of its proper divisors (1).

71448889 is an equidigital number, since it uses as much as digits as its factorization.

71448889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 516096, while the sum is 49.

The square root of 71448889 is about 8452.7444655567. The cubic root of 71448889 is about 414.9526030933.

Subtracting 71448889 from its reverse (98884417), we obtain a triangular number (27435528 = T₇₄₀₇).

The spelling of 71448889 in words is "seventy-one million, four hundred forty-eight thousand, eight hundred eighty-nine".