78653693 has 2 divisors, whose sum is σ = 78653694. Its totient is φ = 78653692.

The previous prime is 78653683. The next prime is 78653699. The reversal of 78653693 is 39635687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77123524 + 1530169 = 8782^2 + 1237^2 .

It is a cyclic number.

It is not a de Polignac number, because 78653693 - 2⁸ = 78653437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78653699) 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, 39326846 + 39326847.

It is an arithmetic number, because the mean of its divisors is an integer number (39326847).

Almost surely, 2^78653693 is an apocalyptic number.

It is an amenable number.

78653693 is a deficient number, since it is larger than the sum of its proper divisors (1).

78653693 is an equidigital number, since it uses as much as digits as its factorization.

78653693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 47.

The square root of 78653693 is about 8868.6917299002. The cubic root of 78653693 is about 428.4561420010.

The spelling of 78653693 in words is "seventy-eight million, six hundred fifty-three thousand, six hundred ninety-three".