78124283 has 2 divisors, whose sum is σ = 78124284. Its totient is φ = 78124282.

The previous prime is 78124273. The next prime is 78124297. The reversal of 78124283 is 38242187.

It is a weak prime.

It is an emirp because it is prime and its reverse (38242187) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78124283 - 2¹² = 78120187 is a prime.

It is a super-2 number, since 2×78124283² = 12206807188528178, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (78124223) 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, 39062141 + 39062142.

It is an arithmetic number, because the mean of its divisors is an integer number (39062142).

Almost surely, 2^78124283 is an apocalyptic number.

78124283 is a deficient number, since it is larger than the sum of its proper divisors (1).

78124283 is an equidigital number, since it uses as much as digits as its factorization.

78124283 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 35.

The square root of 78124283 is about 8838.7942050938. The cubic root of 78124283 is about 427.4926788756.

The spelling of 78124283 in words is "seventy-eight million, one hundred twenty-four thousand, two hundred eighty-three".