78233471 has 2 divisors, whose sum is σ = 78233472. Its totient is φ = 78233470.

The previous prime is 78233461. The next prime is 78233497. The reversal of 78233471 is 17433287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78233471 - 2²² = 74039167 is a prime.

It is a super-3 number, since 3×78233471³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78233401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39116735 + 39116736.

It is an arithmetic number, because the mean of its divisors is an integer number (39116736).

Almost surely, 2^78233471 is an apocalyptic number.

78233471 is a deficient number, since it is larger than the sum of its proper divisors (1).

78233471 is an equidigital number, since it uses as much as digits as its factorization.

78233471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 78233471 is about 8844.9686828162. The cubic root of 78233471 is about 427.6917434946.

The spelling of 78233471 in words is "seventy-eight million, two hundred thirty-three thousand, four hundred seventy-one".