77699 has 2 divisors, whose sum is σ = 77700. Its totient is φ = 77698.

The previous prime is 77689. The next prime is 77711. The reversal of 77699 is 99677.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77699 - 2¹⁶ = 12163 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (77659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38849 + 38850.

It is an arithmetic number, because the mean of its divisors is an integer number (38850).

2⁷⁷⁶⁹⁹ is an apocalyptic number.

77699 is a deficient number, since it is larger than the sum of its proper divisors (1).

77699 is an equidigital number, since it uses as much as digits as its factorization.

77699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23814, while the sum is 38.

The square root of 77699 is about 278.7454035495. The cubic root of 77699 is about 42.6715557006.

The spelling of 77699 in words is "seventy-seven thousand, six hundred ninety-nine".