71640341 has 2 divisors, whose sum is σ = 71640342. Its totient is φ = 71640340.

The previous prime is 71640323. The next prime is 71640347. The reversal of 71640341 is 14304617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61559716 + 10080625 = 7846^2 + 3175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71640341 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71640341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71640347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35820170 + 35820171.

It is an arithmetic number, because the mean of its divisors is an integer number (35820171).

Almost surely, 2^71640341 is an apocalyptic number.

It is an amenable number.

71640341 is a deficient number, since it is larger than the sum of its proper divisors (1).

71640341 is an equidigital number, since it uses as much as digits as its factorization.

71640341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 71640341 is about 8464.0617318165. The cubic root of 71640341 is about 415.3229034777.

Adding to 71640341 its reverse (14304617), we get a palindrome (85944958).

The spelling of 71640341 in words is "seventy-one million, six hundred forty thousand, three hundred forty-one".