71227769 has 2 divisors, whose sum is σ = 71227770. Its totient is φ = 71227768.

The previous prime is 71227753. The next prime is 71227771. The reversal of 71227769 is 96772217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37063744 + 34164025 = 6088^2 + 5845^2 .

It is a cyclic number.

It is not a de Polignac number, because 71227769 - 2⁴ = 71227753 is a prime.

It is a super-2 number, since 2×71227769² = 10146790153434722, which contains 22 as substring.

Together with 71227771, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_4185968 and since 71227769 and 4185968 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (71227369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35613884 + 35613885.

It is an arithmetic number, because the mean of its divisors is an integer number (35613885).

Almost surely, 2^71227769 is an apocalyptic number.

It is an amenable number.

71227769 is a deficient number, since it is larger than the sum of its proper divisors (1).

71227769 is an equidigital number, since it uses as much as digits as its factorization.

71227769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088, while the sum is 41.

The square root of 71227769 is about 8439.6545545419. The cubic root of 71227769 is about 414.5240956773.

The spelling of 71227769 in words is "seventy-one million, two hundred twenty-seven thousand, seven hundred sixty-nine".