77323009 has 2 divisors, whose sum is σ = 77323010. Its totient is φ = 77323008.

The previous prime is 77323003. The next prime is 77323013. The reversal of 77323009 is 90032377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69639025 + 7683984 = 8345^2 + 2772^2 .

It is a cyclic number.

It is not a de Polignac number, because 77323009 - 2⁵ = 77322977 is a prime.

It is not a weakly prime, because it can be changed into another prime (77323003) 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, 38661504 + 38661505.

It is an arithmetic number, because the mean of its divisors is an integer number (38661505).

Almost surely, 2^77323009 is an apocalyptic number.

It is an amenable number.

77323009 is a deficient number, since it is larger than the sum of its proper divisors (1).

77323009 is an equidigital number, since it uses as much as digits as its factorization.

77323009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 31.

The square root of 77323009 is about 8793.3502716541. The cubic root of 77323009 is about 426.0261414303.

The spelling of 77323009 in words is "seventy-seven million, three hundred twenty-three thousand, nine".