77343743497 has 2 divisors, whose sum is σ = 77343743498. Its totient is φ = 77343743496.

The previous prime is 77343743413. The next prime is 77343743527. The reversal of 77343743497 is 79434734377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75131358201 + 2212385296 = 274101^2 + 47036^2 .

It is an emirp because it is prime and its reverse (79434734377) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77343743497 is a prime.

It is not a weakly prime, because it can be changed into another prime (77343843497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38671871748 + 38671871749.

It is an arithmetic number, because the mean of its divisors is an integer number (38671871749).

Almost surely, 2^77343743497 is an apocalyptic number.

It is an amenable number.

77343743497 is a deficient number, since it is larger than the sum of its proper divisors (1).

77343743497 is an equidigital number, since it uses as much as digits as its factorization.

77343743497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37340352, while the sum is 58.

The spelling of 77343743497 in words is "seventy-seven billion, three hundred forty-three million, seven hundred forty-three thousand, four hundred ninety-seven".