78608701 has 2 divisors, whose sum is σ = 78608702. Its totient is φ = 78608700.

The previous prime is 78608693. The next prime is 78608711. The reversal of 78608701 is 10780687.

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., 76983076 + 1625625 = 8774^2 + 1275^2 .

It is a cyclic number.

It is not a de Polignac number, because 78608701 - 2³ = 78608693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78608711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39304350 + 39304351.

It is an arithmetic number, because the mean of its divisors is an integer number (39304351).

Almost surely, 2^78608701 is an apocalyptic number.

It is an amenable number.

78608701 is a deficient number, since it is larger than the sum of its proper divisors (1).

78608701 is an equidigital number, since it uses as much as digits as its factorization.

78608701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 78608701 is about 8866.1548035211. The cubic root of 78608701 is about 428.3744303236.

It can be divided in two parts, 7860 and 8701, that added together give a palindrome (16561).

The spelling of 78608701 in words is "seventy-eight million, six hundred eight thousand, seven hundred one".