71441621 has 2 divisors, whose sum is σ = 71441622. Its totient is φ = 71441620.

The previous prime is 71441609. The next prime is 71441627. The reversal of 71441621 is 12614417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67010596 + 4431025 = 8186^2 + 2105^2 .

It is an emirp because it is prime and its reverse (12614417) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71441621 is a prime.

It is a super-2 number, since 2×71441621² = 10207810422215282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71441627) 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, 35720810 + 35720811.

It is an arithmetic number, because the mean of its divisors is an integer number (35720811).

Almost surely, 2^71441621 is an apocalyptic number.

It is an amenable number.

71441621 is a deficient number, since it is larger than the sum of its proper divisors (1).

71441621 is an equidigital number, since it uses as much as digits as its factorization.

71441621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 26.

The square root of 71441621 is about 8452.3145350845. The cubic root of 71441621 is about 414.9385325327.

The spelling of 71441621 in words is "seventy-one million, four hundred forty-one thousand, six hundred twenty-one".