76480309 has 2 divisors, whose sum is σ = 76480310. Its totient is φ = 76480308.

The previous prime is 76480307. The next prime is 76480333. The reversal of 76480309 is 90308467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59629284 + 16851025 = 7722^2 + 4105^2 .

It is a cyclic number.

It is not a de Polignac number, because 76480309 - 2¹ = 76480307 is a prime.

Together with 76480307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (76480307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38240154 + 38240155.

It is an arithmetic number, because the mean of its divisors is an integer number (38240155).

Almost surely, 2^76480309 is an apocalyptic number.

It is an amenable number.

76480309 is a deficient number, since it is larger than the sum of its proper divisors (1).

76480309 is an equidigital number, since it uses as much as digits as its factorization.

76480309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 76480309 is about 8745.3021102761. The cubic root of 76480309 is about 424.4728116057.

The spelling of 76480309 in words is "seventy-six million, four hundred eighty thousand, three hundred nine".