78922111 has 2 divisors, whose sum is σ = 78922112. Its totient is φ = 78922110.

The previous prime is 78922099. The next prime is 78922163. The reversal of 78922111 is 11122987.

It is a weak prime.

It is an emirp because it is prime and its reverse (11122987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78922111 - 2²³ = 70533503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78929111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39461055 + 39461056.

It is an arithmetic number, because the mean of its divisors is an integer number (39461056).

Almost surely, 2^78922111 is an apocalyptic number.

78922111 is a deficient number, since it is larger than the sum of its proper divisors (1).

78922111 is an equidigital number, since it uses as much as digits as its factorization.

78922111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 31.

The square root of 78922111 is about 8883.8117382124. The cubic root of 78922111 is about 428.9429797631.

The spelling of 78922111 in words is "seventy-eight million, nine hundred twenty-two thousand, one hundred eleven".