71744489 has 2 divisors, whose sum is σ = 71744490. Its totient is φ = 71744488.

The previous prime is 71744461. The next prime is 71744503. The reversal of 71744489 is 98444717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68475625 + 3268864 = 8275^2 + 1808^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71744489 is a prime.

It is a super-2 number, since 2×71744489² = 10294543403742242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71744389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35872244 + 35872245.

It is an arithmetic number, because the mean of its divisors is an integer number (35872245).

Almost surely, 2^71744489 is an apocalyptic number.

It is an amenable number.

71744489 is a deficient number, since it is larger than the sum of its proper divisors (1).

71744489 is an equidigital number, since it uses as much as digits as its factorization.

71744489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 44.

The square root of 71744489 is about 8470.2118627576. The cubic root of 71744489 is about 415.5240662361.

The spelling of 71744489 in words is "seventy-one million, seven hundred forty-four thousand, four hundred eighty-nine".