77344879 has 2 divisors, whose sum is σ = 77344880. Its totient is φ = 77344878.

The previous prime is 77344859. The next prime is 77344909. The reversal of 77344879 is 97844377.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77344879 - 2⁵ = 77344847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77344859) 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, 38672439 + 38672440.

It is an arithmetic number, because the mean of its divisors is an integer number (38672440).

Almost surely, 2^77344879 is an apocalyptic number.

77344879 is a deficient number, since it is larger than the sum of its proper divisors (1).

77344879 is an equidigital number, since it uses as much as digits as its factorization.

77344879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 49.

The square root of 77344879 is about 8794.5937370637. The cubic root of 77344879 is about 426.0663033155.

The spelling of 77344879 in words is "seventy-seven million, three hundred forty-four thousand, eight hundred seventy-nine".