78009133 has 2 divisors, whose sum is σ = 78009134. Its totient is φ = 78009132.

The previous prime is 78009131. The next prime is 78009137. The reversal of 78009133 is 33190087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59320804 + 18688329 = 7702^2 + 4323^2 .

It is a cyclic number.

It is not a de Polignac number, because 78009133 - 2¹ = 78009131 is a prime.

Together with 78009131, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 78009095 and 78009104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78009131) 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, 39004566 + 39004567.

It is an arithmetic number, because the mean of its divisors is an integer number (39004567).

Almost surely, 2^78009133 is an apocalyptic number.

It is an amenable number.

78009133 is a deficient number, since it is larger than the sum of its proper divisors (1).

78009133 is an equidigital number, since it uses as much as digits as its factorization.

78009133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 78009133 is about 8832.2779055009. The cubic root of 78009133 is about 427.2825436693.

The spelling of 78009133 in words is "seventy-eight million, nine thousand, one hundred thirty-three".