78474233 has 2 divisors, whose sum is σ = 78474234. Its totient is φ = 78474232.

The previous prime is 78474217. The next prime is 78474251. The reversal of 78474233 is 33247487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70425664 + 8048569 = 8392^2 + 2837^2 .

It is a cyclic number.

It is not a de Polignac number, because 78474233 - 2⁴ = 78474217 is a prime.

It is equal to p_4585529 and since 78474233 and 4585529 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (78474293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39237116 + 39237117.

It is an arithmetic number, because the mean of its divisors is an integer number (39237117).

Almost surely, 2^78474233 is an apocalyptic number.

It is an amenable number.

78474233 is a deficient number, since it is larger than the sum of its proper divisors (1).

78474233 is an equidigital number, since it uses as much as digits as its factorization.

78474233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 38.

The square root of 78474233 is about 8858.5683380555. The cubic root of 78474233 is about 428.1300318943.

The spelling of 78474233 in words is "seventy-eight million, four hundred seventy-four thousand, two hundred thirty-three".