78208373 has 2 divisors, whose sum is σ = 78208374. Its totient is φ = 78208372.

The previous prime is 78208369. The next prime is 78208391. The reversal of 78208373 is 37380287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77827684 + 380689 = 8822^2 + 617^2 .

It is a cyclic number.

It is not a de Polignac number, because 78208373 - 2² = 78208369 is a prime.

It is a super-2 number, since 2×78208373² = 12233099214614258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78208673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39104186 + 39104187.

It is an arithmetic number, because the mean of its divisors is an integer number (39104187).

Almost surely, 2^78208373 is an apocalyptic number.

It is an amenable number.

78208373 is a deficient number, since it is larger than the sum of its proper divisors (1).

78208373 is an equidigital number, since it uses as much as digits as its factorization.

78208373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 78208373 is about 8843.5497963205. The cubic root of 78208373 is about 427.6460028190.

The spelling of 78208373 in words is "seventy-eight million, two hundred eight thousand, three hundred seventy-three".