71340749 has 2 divisors, whose sum is σ = 71340750. Its totient is φ = 71340748.

The previous prime is 71340743. The next prime is 71340757. The reversal of 71340749 is 94704317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64802500 + 6538249 = 8050^2 + 2557^2 .

It is a cyclic number.

It is not a de Polignac number, because 71340749 - 2¹² = 71336653 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 (71340743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35670374 + 35670375.

It is an arithmetic number, because the mean of its divisors is an integer number (35670375).

Almost surely, 2^71340749 is an apocalyptic number.

It is an amenable number.

71340749 is a deficient number, since it is larger than the sum of its proper divisors (1).

71340749 is an equidigital number, since it uses as much as digits as its factorization.

71340749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 71340749 is about 8446.3453043313. The cubic root of 71340749 is about 414.7431497203.

The spelling of 71340749 in words is "seventy-one million, three hundred forty thousand, seven hundred forty-nine".