71357641 has 2 divisors, whose sum is σ = 71357642. Its totient is φ = 71357640.

The previous prime is 71357639. The next prime is 71357647. The reversal of 71357641 is 14675317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38180041 + 33177600 = 6179^2 + 5760^2 .

It is a cyclic number.

It is not a de Polignac number, because 71357641 - 2¹ = 71357639 is a prime.

Together with 71357639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 71357597 and 71357606.

It is not a weakly prime, because it can be changed into another prime (71357647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35678820 + 35678821.

It is an arithmetic number, because the mean of its divisors is an integer number (35678821).

Almost surely, 2^71357641 is an apocalyptic number.

It is an amenable number.

71357641 is a deficient number, since it is larger than the sum of its proper divisors (1).

71357641 is an equidigital number, since it uses as much as digits as its factorization.

71357641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 34.

The square root of 71357641 is about 8447.3452042639. The cubic root of 71357641 is about 414.7758813101.

The spelling of 71357641 in words is "seventy-one million, three hundred fifty-seven thousand, six hundred forty-one".