78669127 has 2 divisors, whose sum is σ = 78669128. Its totient is φ = 78669126.

The previous prime is 78669113. The next prime is 78669163. The reversal of 78669127 is 72196687.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78669127 - 2¹⁹ = 78144839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78669167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39334563 + 39334564.

It is an arithmetic number, because the mean of its divisors is an integer number (39334564).

Almost surely, 2^78669127 is an apocalyptic number.

78669127 is a deficient number, since it is larger than the sum of its proper divisors (1).

78669127 is an equidigital number, since it uses as much as digits as its factorization.

78669127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 46.

The square root of 78669127 is about 8869.5618268323. The cubic root of 78669127 is about 428.4841650955.

The spelling of 78669127 in words is "seventy-eight million, six hundred sixty-nine thousand, one hundred twenty-seven".