78534853 has 2 divisors, whose sum is σ = 78534854. Its totient is φ = 78534852.

The previous prime is 78534829. The next prime is 78534881. The reversal of 78534853 is 35843587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75377124 + 3157729 = 8682^2 + 1777^2 .

It is a cyclic number.

It is not a de Polignac number, because 78534853 - 2⁹ = 78534341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78534823) 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, 39267426 + 39267427.

It is an arithmetic number, because the mean of its divisors is an integer number (39267427).

Almost surely, 2^78534853 is an apocalyptic number.

It is an amenable number.

78534853 is a deficient number, since it is larger than the sum of its proper divisors (1).

78534853 is an equidigital number, since it uses as much as digits as its factorization.

78534853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 43.

The square root of 78534853 is about 8861.9892236450. The cubic root of 78534853 is about 428.2402445573.

The spelling of 78534853 in words is "seventy-eight million, five hundred thirty-four thousand, eight hundred fifty-three".