123420329 has 2 divisors, whose sum is σ = 123420330. Its totient is φ = 123420328.

The previous prime is 123420313. The next prime is 123420347. The reversal of 123420329 is 923024321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111344704 + 12075625 = 10552^2 + 3475^2 .

It is an emirp because it is prime and its reverse (923024321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123420329 - 2⁴ = 123420313 is a prime.

It is a super-2 number, since 2×123420329² = 30465155220936482, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 123420298 and 123420307.

It is not a weakly prime, because it can be changed into another prime (123420229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61710164 + 61710165.

It is an arithmetic number, because the mean of its divisors is an integer number (61710165).

Almost surely, 2^123420329 is an apocalyptic number.

It is an amenable number.

123420329 is a deficient number, since it is larger than the sum of its proper divisors (1).

123420329 is an equidigital number, since it uses as much as digits as its factorization.

123420329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 123420329 is about 11109.4702393949. The cubic root of 123420329 is about 497.8848367866.

The spelling of 123420329 in words is "one hundred twenty-three million, four hundred twenty thousand, three hundred twenty-nine".