78489399083 has 2 divisors, whose sum is σ = 78489399084. Its totient is φ = 78489399082.

The previous prime is 78489399073. The next prime is 78489399097. The reversal of 78489399083 is 38099398487.

It is a weak prime.

It is an emirp because it is prime and its reverse (38099398487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78489399083 - 2³⁰ = 77415657259 is a prime.

It is not a weakly prime, because it can be changed into another prime (78489399013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39244699541 + 39244699542.

It is an arithmetic number, because the mean of its divisors is an integer number (39244699542).

Almost surely, 2^78489399083 is an apocalyptic number.

78489399083 is a deficient number, since it is larger than the sum of its proper divisors (1).

78489399083 is an equidigital number, since it uses as much as digits as its factorization.

78489399083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94058496, while the sum is 68.

The spelling of 78489399083 in words is "seventy-eight billion, four hundred eighty-nine million, three hundred ninety-nine thousand, eighty-three".