71720927233 has 2 divisors, whose sum is σ = 71720927234. Its totient is φ = 71720927232.

The previous prime is 71720927227. The next prime is 71720927261. The reversal of 71720927233 is 33272902717.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64015072144 + 7705855089 = 253012^2 + 87783^2 .

It is a cyclic number.

It is not a de Polignac number, because 71720927233 - 2⁹ = 71720926721 is a prime.

It is a super-2 number, since 2×71720927233² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71720927233.

It is not a weakly prime, because it can be changed into another prime (71720927203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35860463616 + 35860463617.

It is an arithmetic number, because the mean of its divisors is an integer number (35860463617).

Almost surely, 2^71720927233 is an apocalyptic number.

It is an amenable number.

71720927233 is a deficient number, since it is larger than the sum of its proper divisors (1).

71720927233 is an equidigital number, since it uses as much as digits as its factorization.

71720927233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 222264, while the sum is 43.

The spelling of 71720927233 in words is "seventy-one billion, seven hundred twenty million, nine hundred twenty-seven thousand, two hundred thirty-three".