71350621 has 2 divisors, whose sum is σ = 71350622. Its totient is φ = 71350620.

The previous prime is 71350613. The next prime is 71350633. The reversal of 71350621 is 12605317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70728100 + 622521 = 8410^2 + 789^2 .

It is an emirp because it is prime and its reverse (12605317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71350621 - 2³ = 71350613 is a prime.

It is a super-2 number, since 2×71350621² = 10181822234171282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71350661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35675310 + 35675311.

It is an arithmetic number, because the mean of its divisors is an integer number (35675311).

Almost surely, 2^71350621 is an apocalyptic number.

It is an amenable number.

71350621 is a deficient number, since it is larger than the sum of its proper divisors (1).

71350621 is an equidigital number, since it uses as much as digits as its factorization.

71350621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 71350621 is about 8446.9296788833. The cubic root of 71350621 is about 414.7622792995.

Adding to 71350621 its reverse (12605317), we get a palindrome (83955938).

The spelling of 71350621 in words is "seventy-one million, three hundred fifty thousand, six hundred twenty-one".