78667349 has 2 divisors, whose sum is σ = 78667350. Its totient is φ = 78667348.

The previous prime is 78667333. The next prime is 78667357. The reversal of 78667349 is 94376687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78446449 + 220900 = 8857^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 78667349 - 2⁴ = 78667333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78667297 and 78667306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78660349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39333674 + 39333675.

It is an arithmetic number, because the mean of its divisors is an integer number (39333675).

Almost surely, 2^78667349 is an apocalyptic number.

It is an amenable number.

78667349 is a deficient number, since it is larger than the sum of its proper divisors (1).

78667349 is an equidigital number, since it uses as much as digits as its factorization.

78667349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 50.

The square root of 78667349 is about 8869.4615958355. The cubic root of 78667349 is about 428.4809370160.

The spelling of 78667349 in words is "seventy-eight million, six hundred sixty-seven thousand, three hundred forty-nine".