78433073 has 2 divisors, whose sum is σ = 78433074. Its totient is φ = 78433072.

The previous prime is 78433067. The next prime is 78433097. The reversal of 78433073 is 37033487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74943649 + 3489424 = 8657^2 + 1868^2 .

It is an emirp because it is prime and its reverse (37033487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78433073 - 2⁶ = 78433009 is a prime.

It is not a weakly prime, because it can be changed into another prime (78433063) 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, 39216536 + 39216537.

It is an arithmetic number, because the mean of its divisors is an integer number (39216537).

Almost surely, 2^78433073 is an apocalyptic number.

It is an amenable number.

78433073 is a deficient number, since it is larger than the sum of its proper divisors (1).

78433073 is an equidigital number, since it uses as much as digits as its factorization.

78433073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 78433073 is about 8856.2448588552. The cubic root of 78433073 is about 428.0551669216.

The spelling of 78433073 in words is "seventy-eight million, four hundred thirty-three thousand, seventy-three".