71350661 has 2 divisors, whose sum is σ = 71350662. Its totient is φ = 71350660.

The previous prime is 71350639. The next prime is 71350673. The reversal of 71350661 is 16605317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61622500 + 9728161 = 7850^2 + 3119^2 .

It is an emirp because it is prime and its reverse (16605317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71350661 - 2⁶ = 71350597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71350621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35675330 + 35675331.

It is an arithmetic number, because the mean of its divisors is an integer number (35675331).

Almost surely, 2^71350661 is an apocalyptic number.

It is an amenable number.

71350661 is a deficient number, since it is larger than the sum of its proper divisors (1).

71350661 is an equidigital number, since it uses as much as digits as its factorization.

71350661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 71350661 is about 8446.9320466072. The cubic root of 71350661 is about 414.7623568064.

Adding to 71350661 its reverse (16605317), we get a palindrome (87955978).

The spelling of 71350661 in words is "seventy-one million, three hundred fifty thousand, six hundred sixty-one".