78327677 has 2 divisors, whose sum is σ = 78327678. Its totient is φ = 78327676.

The previous prime is 78327643. The next prime is 78327701. The reversal of 78327677 is 77672387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61795321 + 16532356 = 7861^2 + 4066^2 .

It is a cyclic number.

It is not a de Polignac number, because 78327677 - 2¹⁰ = 78326653 is a prime.

It is a super-2 number, since 2×78327677² = 12270449968432658, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78327077) 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, 39163838 + 39163839.

It is an arithmetic number, because the mean of its divisors is an integer number (39163839).

Almost surely, 2^78327677 is an apocalyptic number.

It is an amenable number.

78327677 is a deficient number, since it is larger than the sum of its proper divisors (1).

78327677 is an equidigital number, since it uses as much as digits as its factorization.

78327677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691488, while the sum is 47.

The square root of 78327677 is about 8850.2924810426. The cubic root of 78327677 is about 427.8633450964.

The spelling of 78327677 in words is "seventy-eight million, three hundred twenty-seven thousand, six hundred seventy-seven".