7820123 has 2 divisors, whose sum is σ = 7820124. Its totient is φ = 7820122.

The previous prime is 7820107. The next prime is 7820143. The reversal of 7820123 is 3210287.

It is a weak prime.

It is an emirp because it is prime and its reverse (3210287) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7820123 - 2⁴ = 7820107 is a prime.

It is a super-2 number, since 2×7820123² = 122308647470258, which contains 22 as substring.

It is equal to p₅₂₈₄₃₁ and since 7820123 and 528431 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (7820143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3910061 + 3910062.

It is an arithmetic number, because the mean of its divisors is an integer number (3910062).

Almost surely, 2^7820123 is an apocalyptic number.

7820123 is a deficient number, since it is larger than the sum of its proper divisors (1).

7820123 is an equidigital number, since it uses as much as digits as its factorization.

7820123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 7820123 is about 2796.4482830905. The cubic root of 7820123 is about 198.4896478939.

The spelling of 7820123 in words is "seven million, eight hundred twenty thousand, one hundred twenty-three".