76444409 has 2 divisors, whose sum is σ = 76444410. Its totient is φ = 76444408.

The previous prime is 76444373. The next prime is 76444451. The reversal of 76444409 is 90444467.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63282025 + 13162384 = 7955^2 + 3628^2 .

It is a cyclic number.

It is not a de Polignac number, because 76444409 - 2¹⁶ = 76378873 is a prime.

It is not a weakly prime, because it can be changed into another prime (76444469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38222204 + 38222205.

It is an arithmetic number, because the mean of its divisors is an integer number (38222205).

Almost surely, 2^76444409 is an apocalyptic number.

It is an amenable number.

76444409 is a deficient number, since it is larger than the sum of its proper divisors (1).

76444409 is an equidigital number, since it uses as much as digits as its factorization.

76444409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 76444409 is about 8743.2493387756. The cubic root of 76444409 is about 424.4063851006.

The spelling of 76444409 in words is "seventy-six million, four hundred forty-four thousand, four hundred nine".