78084533 has 2 divisors, whose sum is σ = 78084534. Its totient is φ = 78084532.

The previous prime is 78084527. The next prime is 78084551. The reversal of 78084533 is 33548087.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77563249 + 521284 = 8807^2 + 722^2 .

It is an emirp because it is prime and its reverse (33548087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78084533 - 2⁸ = 78084277 is a prime.

It is a super-3 number, since 3×78084533³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78084583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39042266 + 39042267.

It is an arithmetic number, because the mean of its divisors is an integer number (39042267).

Almost surely, 2^78084533 is an apocalyptic number.

It is an amenable number.

78084533 is a deficient number, since it is larger than the sum of its proper divisors (1).

78084533 is an equidigital number, since it uses as much as digits as its factorization.

78084533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 78084533 is about 8836.5453091126. The cubic root of 78084533 is about 427.4201631517.

The spelling of 78084533 in words is "seventy-eight million, eighty-four thousand, five hundred thirty-three".