78780983 has 2 divisors, whose sum is σ = 78780984. Its totient is φ = 78780982.

The previous prime is 78780971. The next prime is 78780991. The reversal of 78780983 is 38908787.

It is a strong prime.

It is an emirp because it is prime and its reverse (38908787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78780983 - 2¹⁶ = 78715447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78783983) 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, 39390491 + 39390492.

It is an arithmetic number, because the mean of its divisors is an integer number (39390492).

Almost surely, 2^78780983 is an apocalyptic number.

78780983 is a deficient number, since it is larger than the sum of its proper divisors (1).

78780983 is an equidigital number, since it uses as much as digits as its factorization.

78780983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 50.

The square root of 78780983 is about 8875.8651972639. The cubic root of 78780983 is about 428.6871495391.

The spelling of 78780983 in words is "seventy-eight million, seven hundred eighty thousand, nine hundred eighty-three".