77804734793 has 2 divisors, whose sum is σ = 77804734794. Its totient is φ = 77804734792.

The previous prime is 77804734759. The next prime is 77804734801. The reversal of 77804734793 is 39743740877.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76913592889 + 891141904 = 277333^2 + 29852^2 .

It is an emirp because it is prime and its reverse (39743740877) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77804734793 - 2⁸ = 77804734537 is a prime.

It is not a weakly prime, because it can be changed into another prime (77804734193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38902367396 + 38902367397.

It is an arithmetic number, because the mean of its divisors is an integer number (38902367397).

Almost surely, 2^77804734793 is an apocalyptic number.

It is an amenable number.

77804734793 is a deficient number, since it is larger than the sum of its proper divisors (1).

77804734793 is an equidigital number, since it uses as much as digits as its factorization.

77804734793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24893568, while the sum is 59.

The spelling of 77804734793 in words is "seventy-seven billion, eight hundred four million, seven hundred thirty-four thousand, seven hundred ninety-three".