71776049 has 2 divisors, whose sum is σ = 71776050. Its totient is φ = 71776048.

The previous prime is 71776043. The next prime is 71776051. The reversal of 71776049 is 94067717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64513024 + 7263025 = 8032^2 + 2695^2 .

It is a cyclic number.

It is not a de Polignac number, because 71776049 - 2²⁴ = 54998833 is a prime.

It is a Sophie Germain prime.

Together with 71776051, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71775997 and 71776015.

It is not a weakly prime, because it can be changed into another prime (71776043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35888024 + 35888025.

It is an arithmetic number, because the mean of its divisors is an integer number (35888025).

Almost surely, 2^71776049 is an apocalyptic number.

It is an amenable number.

71776049 is a deficient number, since it is larger than the sum of its proper divisors (1).

71776049 is an equidigital number, since it uses as much as digits as its factorization.

71776049 is an odious number, because the sum of its binary digits is odd.

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

The square root of 71776049 is about 8472.0746573670. The cubic root of 71776049 is about 415.5849862095.

The spelling of 71776049 in words is "seventy-one million, seven hundred seventy-six thousand, forty-nine".