71740997 has 2 divisors, whose sum is σ = 71740998. Its totient is φ = 71740996.

The previous prime is 71740973. The next prime is 71741051. The reversal of 71740997 is 79904717.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41809156 + 29931841 = 6466^2 + 5471^2 .

It is a cyclic number.

It is not a de Polignac number, because 71740997 - 2¹⁰ = 71739973 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 (71770997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35870498 + 35870499.

It is an arithmetic number, because the mean of its divisors is an integer number (35870499).

Almost surely, 2^71740997 is an apocalyptic number.

It is an amenable number.

71740997 is a deficient number, since it is larger than the sum of its proper divisors (1).

71740997 is an equidigital number, since it uses as much as digits as its factorization.

71740997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 111132, while the sum is 44.

The square root of 71740997 is about 8470.0057260902. The cubic root of 71740997 is about 415.5173245634.

It can be divided in two parts, 717 and 40997, that added together give a palindrome (41714).

The spelling of 71740997 in words is "seventy-one million, seven hundred forty thousand, nine hundred ninety-seven".