78383796397 has 2 divisors, whose sum is σ = 78383796398. Its totient is φ = 78383796396.

The previous prime is 78383796389. The next prime is 78383796437. The reversal of 78383796397 is 79369738387.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78374242116 + 9554281 = 279954^2 + 3091^2 .

It is a cyclic number.

It is not a de Polignac number, because 78383796397 - 2³ = 78383796389 is a prime.

It is a super-2 number, since 2×78383796397² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78383596397) 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, 39191898198 + 39191898199.

It is an arithmetic number, because the mean of its divisors is an integer number (39191898199).

Almost surely, 2^78383796397 is an apocalyptic number.

It is an amenable number.

78383796397 is a deficient number, since it is larger than the sum of its proper divisors (1).

78383796397 is an equidigital number, since it uses as much as digits as its factorization.

78383796397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288054144, while the sum is 70.

The spelling of 78383796397 in words is "seventy-eight billion, three hundred eighty-three million, seven hundred ninety-six thousand, three hundred ninety-seven".