71424289 has 2 divisors, whose sum is σ = 71424290. Its totient is φ = 71424288.

The previous prime is 71424281. The next prime is 71424313. The reversal of 71424289 is 98242417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69555600 + 1868689 = 8340^2 + 1367^2 .

It is a cyclic number.

It is not a de Polignac number, because 71424289 - 2³ = 71424281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71424281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35712144 + 35712145.

It is an arithmetic number, because the mean of its divisors is an integer number (35712145).

Almost surely, 2^71424289 is an apocalyptic number.

It is an amenable number.

71424289 is a deficient number, since it is larger than the sum of its proper divisors (1).

71424289 is an equidigital number, since it uses as much as digits as its factorization.

71424289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 37.

The square root of 71424289 is about 8451.2891915967. The cubic root of 71424289 is about 414.9049746141.

The spelling of 71424289 in words is "seventy-one million, four hundred twenty-four thousand, two hundred eighty-nine".