77963693 has 2 divisors, whose sum is σ = 77963694. Its totient is φ = 77963692.

The previous prime is 77963659. The next prime is 77963713. The reversal of 77963693 is 39636977.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76702564 + 1261129 = 8758^2 + 1123^2 .

It is a cyclic number.

It is not a de Polignac number, because 77963693 - 2⁸ = 77963437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77963393) 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, 38981846 + 38981847.

It is an arithmetic number, because the mean of its divisors is an integer number (38981847).

Almost surely, 2^77963693 is an apocalyptic number.

It is an amenable number.

77963693 is a deficient number, since it is larger than the sum of its proper divisors (1).

77963693 is an equidigital number, since it uses as much as digits as its factorization.

77963693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1285956, while the sum is 50.

The square root of 77963693 is about 8829.7051479650. The cubic root of 77963693 is about 427.1995641124.

The spelling of 77963693 in words is "seventy-seven million, nine hundred sixty-three thousand, six hundred ninety-three".