71452769 has 2 divisors, whose sum is σ = 71452770. Its totient is φ = 71452768.

The previous prime is 71452729. The next prime is 71452807. The reversal of 71452769 is 96725417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36784225 + 34668544 = 6065^2 + 5888^2 .

It is an emirp because it is prime and its reverse (96725417) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71452769 is a prime.

It is a super-2 number, since 2×71452769² = 10210996395534722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71452729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35726384 + 35726385.

It is an arithmetic number, because the mean of its divisors is an integer number (35726385).

Almost surely, 2^71452769 is an apocalyptic number.

It is an amenable number.

71452769 is a deficient number, since it is larger than the sum of its proper divisors (1).

71452769 is an equidigital number, since it uses as much as digits as its factorization.

71452769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 41.

The square root of 71452769 is about 8452.9739736971. The cubic root of 71452769 is about 414.9601142293.

The spelling of 71452769 in words is "seventy-one million, four hundred fifty-two thousand, seven hundred sixty-nine".