78903620893 has 2 divisors, whose sum is σ = 78903620894. Its totient is φ = 78903620892.

The previous prime is 78903620881. The next prime is 78903620923. The reversal of 78903620893 is 39802630987.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59847751044 + 19055869849 = 244638^2 + 138043^2 .

It is a cyclic number.

It is not a de Polignac number, because 78903620893 - 2⁹ = 78903620381 is a prime.

It is a super-2 number, since 2×78903620893² (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 (78903620093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39451810446 + 39451810447.

It is an arithmetic number, because the mean of its divisors is an integer number (39451810447).

Almost surely, 2^78903620893 is an apocalyptic number.

It is an amenable number.

78903620893 is a deficient number, since it is larger than the sum of its proper divisors (1).

78903620893 is an equidigital number, since it uses as much as digits as its factorization.

78903620893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 78903620893 in words is "seventy-eight billion, nine hundred three million, six hundred twenty thousand, eight hundred ninety-three".