78903621983 has 2 divisors, whose sum is σ = 78903621984. Its totient is φ = 78903621982.

The previous prime is 78903621947. The next prime is 78903621989. The reversal of 78903621983 is 38912630987.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78903621983 - 2²⁴ = 78886844767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78903621989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39451810991 + 39451810992.

It is an arithmetic number, because the mean of its divisors is an integer number (39451810992).

Almost surely, 2^78903621983 is an apocalyptic number.

78903621983 is a deficient number, since it is larger than the sum of its proper divisors (1).

78903621983 is an equidigital number, since it uses as much as digits as its factorization.

78903621983 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 56.

The spelling of 78903621983 in words is "seventy-eight billion, nine hundred three million, six hundred twenty-one thousand, nine hundred eighty-three".