77763893 has 2 divisors, whose sum is σ = 77763894. Its totient is φ = 77763892.

The previous prime is 77763869. The next prime is 77763929. The reversal of 77763893 is 39836777.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70677649 + 7086244 = 8407^2 + 2662^2 .

It is a cyclic number.

It is not a de Polignac number, because 77763893 - 2¹⁰ = 77762869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77763853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38881946 + 38881947.

It is an arithmetic number, because the mean of its divisors is an integer number (38881947).

Almost surely, 2^77763893 is an apocalyptic number.

It is an amenable number.

77763893 is a deficient number, since it is larger than the sum of its proper divisors (1).

77763893 is an equidigital number, since it uses as much as digits as its factorization.

77763893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 50.

The square root of 77763893 is about 8818.3838088393. The cubic root of 77763893 is about 426.8343193549.

The spelling of 77763893 in words is "seventy-seven million, seven hundred sixty-three thousand, eight hundred ninety-three".