71274737 has 2 divisors, whose sum is σ = 71274738. Its totient is φ = 71274736.

The previous prime is 71274689. The next prime is 71274739. The reversal of 71274737 is 73747217.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69872881 + 1401856 = 8359^2 + 1184^2 .

It is an emirp because it is prime and its reverse (73747217) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71274737 is a prime.

Together with 71274739, it forms a pair of twin primes.

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 71274737.

It is not a weakly prime, because it can be changed into another prime (71274739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35637368 + 35637369.

It is an arithmetic number, because the mean of its divisors is an integer number (35637369).

Almost surely, 2^71274737 is an apocalyptic number.

It is an amenable number.

71274737 is a deficient number, since it is larger than the sum of its proper divisors (1).

71274737 is an equidigital number, since it uses as much as digits as its factorization.

71274737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57624, while the sum is 38.

The square root of 71274737 is about 8442.4366743257. The cubic root of 71274737 is about 414.6151888476.

The spelling of 71274737 in words is "seventy-one million, two hundred seventy-four thousand, seven hundred thirty-seven".