71541629 has 2 divisors, whose sum is σ = 71541630. Its totient is φ = 71541628.

The previous prime is 71541623. The next prime is 71541641. The reversal of 71541629 is 92614517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71402500 + 139129 = 8450^2 + 373^2 .

It is an emirp because it is prime and its reverse (92614517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71541629 - 2¹² = 71537533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71541623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35770814 + 35770815.

It is an arithmetic number, because the mean of its divisors is an integer number (35770815).

Almost surely, 2^71541629 is an apocalyptic number.

It is an amenable number.

71541629 is a deficient number, since it is larger than the sum of its proper divisors (1).

71541629 is an equidigital number, since it uses as much as digits as its factorization.

71541629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 35.

The square root of 71541629 is about 8458.2284788246. The cubic root of 71541629 is about 415.1320603570.

The spelling of 71541629 in words is "seventy-one million, five hundred forty-one thousand, six hundred twenty-nine".