78226123 has 2 divisors, whose sum is σ = 78226124. Its totient is φ = 78226122.

The previous prime is 78226121. The next prime is 78226133. The reversal of 78226123 is 32162287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78226123 - 2¹ = 78226121 is a prime.

It is a super-2 number, since 2×78226123² = 12238652639222258, which contains 22 as substring.

Together with 78226121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (78226121) 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, 39113061 + 39113062.

It is an arithmetic number, because the mean of its divisors is an integer number (39113062).

Almost surely, 2^78226123 is an apocalyptic number.

78226123 is a deficient number, since it is larger than the sum of its proper divisors (1).

78226123 is an equidigital number, since it uses as much as digits as its factorization.

78226123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 31.

The square root of 78226123 is about 8844.5532956730. The cubic root of 78226123 is about 427.6783529032.

The spelling of 78226123 in words is "seventy-eight million, two hundred twenty-six thousand, one hundred twenty-three".