78628853 has 2 divisors, whose sum is σ = 78628854. Its totient is φ = 78628852.

The previous prime is 78628841. The next prime is 78628867. The reversal of 78628853 is 35882687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75030244 + 3598609 = 8662^2 + 1897^2 .

It is an emirp because it is prime and its reverse (35882687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78628853 - 2¹⁸ = 78366709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78628798 and 78628807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78628873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39314426 + 39314427.

It is an arithmetic number, because the mean of its divisors is an integer number (39314427).

Almost surely, 2^78628853 is an apocalyptic number.

It is an amenable number.

78628853 is a deficient number, since it is larger than the sum of its proper divisors (1).

78628853 is an equidigital number, since it uses as much as digits as its factorization.

78628853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 645120, while the sum is 47.

The square root of 78628853 is about 8867.2911872792. The cubic root of 78628853 is about 428.4110329890.

The spelling of 78628853 in words is "seventy-eight million, six hundred twenty-eight thousand, eight hundred fifty-three".