78869111 has 2 divisors, whose sum is σ = 78869112. Its totient is φ = 78869110.

The previous prime is 78869099. The next prime is 78869123. The reversal of 78869111 is 11196887.

It is a balanced prime because it is at equal distance from previous prime (78869099) and next prime (78869123).

It is a cyclic number.

It is not a de Polignac number, because 78869111 - 2¹⁴ = 78852727 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78869191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39434555 + 39434556.

It is an arithmetic number, because the mean of its divisors is an integer number (39434556).

Almost surely, 2^78869111 is an apocalyptic number.

78869111 is a deficient number, since it is larger than the sum of its proper divisors (1).

78869111 is an equidigital number, since it uses as much as digits as its factorization.

78869111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 41.

The square root of 78869111 is about 8880.8282834429. The cubic root of 78869111 is about 428.8469396356.

The spelling of 78869111 in words is "seventy-eight million, eight hundred sixty-nine thousand, one hundred eleven".