78366443 has 2 divisors, whose sum is σ = 78366444. Its totient is φ = 78366442.

The previous prime is 78366377. The next prime is 78366461. The reversal of 78366443 is 34466387.

It is a strong prime.

It is an emirp because it is prime and its reverse (34466387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78366443 - 2⁸ = 78366187 is a prime.

It is a super-2 number, since 2×78366443² = 12282598776944498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78366443.

It is not a weakly prime, because it can be changed into another prime (78366473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39183221 + 39183222.

It is an arithmetic number, because the mean of its divisors is an integer number (39183222).

Almost surely, 2^78366443 is an apocalyptic number.

78366443 is a deficient number, since it is larger than the sum of its proper divisors (1).

78366443 is an equidigital number, since it uses as much as digits as its factorization.

78366443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 41.

The square root of 78366443 is about 8852.4823072402. The cubic root of 78366443 is about 427.9339196173.

The spelling of 78366443 in words is "seventy-eight million, three hundred sixty-six thousand, four hundred forty-three".