76128449 has 2 divisors, whose sum is σ = 76128450. Its totient is φ = 76128448.

The previous prime is 76128407. The next prime is 76128461. The reversal of 76128449 is 94482167.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52780225 + 23348224 = 7265^2 + 4832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76128449 is a prime.

It is not a weakly prime, because it can be changed into another prime (76128469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38064224 + 38064225.

It is an arithmetic number, because the mean of its divisors is an integer number (38064225).

Almost surely, 2^76128449 is an apocalyptic number.

It is an amenable number.

76128449 is a deficient number, since it is larger than the sum of its proper divisors (1).

76128449 is an equidigital number, since it uses as much as digits as its factorization.

76128449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The square root of 76128449 is about 8725.1618323100. The cubic root of 76128449 is about 423.8208588935.

It can be divided in two parts, 7612 and 8449, that added together give a palindrome (16061).

The spelling of 76128449 in words is "seventy-six million, one hundred twenty-eight thousand, four hundred forty-nine".