77434811 has 2 divisors, whose sum is σ = 77434812. Its totient is φ = 77434810.

The previous prime is 77434793. The next prime is 77434817. The reversal of 77434811 is 11843477.

It is a strong prime.

It is an emirp because it is prime and its reverse (11843477) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77434811 is a prime.

It is a super-2 number, since 2×77434811² = 11992299909211442, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (77434817) 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, 38717405 + 38717406.

It is an arithmetic number, because the mean of its divisors is an integer number (38717406).

Almost surely, 2^77434811 is an apocalyptic number.

77434811 is a deficient number, since it is larger than the sum of its proper divisors (1).

77434811 is an equidigital number, since it uses as much as digits as its factorization.

77434811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 35.

The square root of 77434811 is about 8799.7051655155. The cubic root of 77434811 is about 426.2313741600.

The spelling of 77434811 in words is "seventy-seven million, four hundred thirty-four thousand, eight hundred eleven".