71689441 has 2 divisors, whose sum is σ = 71689442. Its totient is φ = 71689440.

The previous prime is 71689427. The next prime is 71689447. The reversal of 71689441 is 14498617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39438400 + 32251041 = 6280^2 + 5679^2 .

It is a cyclic number.

It is not a de Polignac number, because 71689441 - 2¹⁷ = 71558369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71689394 and 71689403.

It is not a weakly prime, because it can be changed into another prime (71689447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35844720 + 35844721.

It is an arithmetic number, because the mean of its divisors is an integer number (35844721).

Almost surely, 2^71689441 is an apocalyptic number.

It is an amenable number.

71689441 is a deficient number, since it is larger than the sum of its proper divisors (1).

71689441 is an equidigital number, since it uses as much as digits as its factorization.

71689441 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 71689441 is about 8466.9617337035. The cubic root of 71689441 is about 415.4177648240.

The spelling of 71689441 in words is "seventy-one million, six hundred eighty-nine thousand, four hundred forty-one".