78561283 has 2 divisors, whose sum is σ = 78561284. Its totient is φ = 78561282.

The previous prime is 78561281. The next prime is 78561331. The reversal of 78561283 is 38216587.

It is a weak prime.

It is an emirp because it is prime and its reverse (38216587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78561283 - 2¹ = 78561281 is a prime.

Together with 78561281, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (78561281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39280641 + 39280642.

It is an arithmetic number, because the mean of its divisors is an integer number (39280642).

Almost surely, 2^78561283 is an apocalyptic number.

78561283 is a deficient number, since it is larger than the sum of its proper divisors (1).

78561283 is an equidigital number, since it uses as much as digits as its factorization.

78561283 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 78561283 is about 8863.4802983930. The cubic root of 78561283 is about 428.2882789427.

The spelling of 78561283 in words is "seventy-eight million, five hundred sixty-one thousand, two hundred eighty-three".