78505333 has 2 divisors, whose sum is σ = 78505334. Its totient is φ = 78505332.

The previous prime is 78505327. The next prime is 78505351. The reversal of 78505333 is 33350587.

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., 42289009 + 36216324 = 6503^2 + 6018^2 .

It is an emirp because it is prime and its reverse (33350587) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78505333 - 2⁹ = 78504821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78505313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39252666 + 39252667.

It is an arithmetic number, because the mean of its divisors is an integer number (39252667).

Almost surely, 2^78505333 is an apocalyptic number.

It is an amenable number.

78505333 is a deficient number, since it is larger than the sum of its proper divisors (1).

78505333 is an equidigital number, since it uses as much as digits as its factorization.

78505333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 78505333 is about 8860.3235268245. The cubic root of 78505333 is about 428.1865816047.

The spelling of 78505333 in words is "seventy-eight million, five hundred five thousand, three hundred thirty-three".