77823899 has 2 divisors, whose sum is σ = 77823900. Its totient is φ = 77823898.

The previous prime is 77823847. The next prime is 77823931. The reversal of 77823899 is 99832877.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77823899 - 2⁸ = 77823643 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77823899.

It is not a weakly prime, because it can be changed into another prime (77823199) 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, 38911949 + 38911950.

It is an arithmetic number, because the mean of its divisors is an integer number (38911950).

Almost surely, 2^77823899 is an apocalyptic number.

77823899 is a deficient number, since it is larger than the sum of its proper divisors (1).

77823899 is an equidigital number, since it uses as much as digits as its factorization.

77823899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 53.

The square root of 77823899 is about 8821.7854768748. The cubic root of 77823899 is about 426.9440790993.

The spelling of 77823899 in words is "seventy-seven million, eight hundred twenty-three thousand, eight hundred ninety-nine".