71223682997 has 2 divisors, whose sum is σ = 71223682998. Its totient is φ = 71223682996.

The previous prime is 71223682993. The next prime is 71223683023. The reversal of 71223682997 is 79928632217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70691642641 + 532040356 = 265879^2 + 23066^2 .

It is a cyclic number.

It is not a de Polignac number, because 71223682997 - 2² = 71223682993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71223682993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35611841498 + 35611841499.

It is an arithmetic number, because the mean of its divisors is an integer number (35611841499).

Almost surely, 2^71223682997 is an apocalyptic number.

It is an amenable number.

71223682997 is a deficient number, since it is larger than the sum of its proper divisors (1).

71223682997 is an equidigital number, since it uses as much as digits as its factorization.

71223682997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 56.

The spelling of 71223682997 in words is "seventy-one billion, two hundred twenty-three million, six hundred eighty-two thousand, nine hundred ninety-seven".