78083867 has 2 divisors, whose sum is σ = 78083868. Its totient is φ = 78083866.

The previous prime is 78083861. The next prime is 78083869. The reversal of 78083867 is 76838087.

It is a strong prime.

It is an emirp because it is prime and its reverse (76838087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78083867 - 2⁴ = 78083851 is a prime.

Together with 78083869, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78083861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39041933 + 39041934.

It is an arithmetic number, because the mean of its divisors is an integer number (39041934).

Almost surely, 2^78083867 is an apocalyptic number.

78083867 is a deficient number, since it is larger than the sum of its proper divisors (1).

78083867 is an equidigital number, since it uses as much as digits as its factorization.

78083867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 78083867 is about 8836.5076246218. The cubic root of 78083867 is about 427.4189479616.

The spelling of 78083867 in words is "seventy-eight million, eighty-three thousand, eight hundred sixty-seven".