78604853 has 2 divisors, whose sum is σ = 78604854. Its totient is φ = 78604852.

The previous prime is 78604849. The next prime is 78604891. The reversal of 78604853 is 35840687.

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., 78446449 + 158404 = 8857^2 + 398^2 .

It is an emirp because it is prime and its reverse (35840687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78604853 - 2² = 78604849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78604853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78604153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39302426 + 39302427.

It is an arithmetic number, because the mean of its divisors is an integer number (39302427).

Almost surely, 2^78604853 is an apocalyptic number.

It is an amenable number.

78604853 is a deficient number, since it is larger than the sum of its proper divisors (1).

78604853 is an equidigital number, since it uses as much as digits as its factorization.

78604853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 78604853 is about 8865.9377958567. The cubic root of 78604853 is about 428.3674403777.

The spelling of 78604853 in words is "seventy-eight million, six hundred four thousand, eight hundred fifty-three".