76539649 has 2 divisors, whose sum is σ = 76539650. Its totient is φ = 76539648.

The previous prime is 76539637. The next prime is 76539709. The reversal of 76539649 is 94693567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51739249 + 24800400 = 7193^2 + 4980^2 .

It is a cyclic number.

It is not a de Polignac number, because 76539649 - 2⁹ = 76539137 is a prime.

It is not a weakly prime, because it can be changed into another prime (76539629) 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, 38269824 + 38269825.

It is an arithmetic number, because the mean of its divisors is an integer number (38269825).

Almost surely, 2^76539649 is an apocalyptic number.

It is an amenable number.

76539649 is a deficient number, since it is larger than the sum of its proper divisors (1).

76539649 is an equidigital number, since it uses as much as digits as its factorization.

76539649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 49.

The square root of 76539649 is about 8748.6941311261. The cubic root of 76539649 is about 424.5825640608.

The spelling of 76539649 in words is "seventy-six million, five hundred thirty-nine thousand, six hundred forty-nine".