123326491 has 2 divisors, whose sum is σ = 123326492. Its totient is φ = 123326490.

The previous prime is 123326471. The next prime is 123326507. The reversal of 123326491 is 194623321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123326491 - 2⁵ = 123326459 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123326471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61663245 + 61663246.

It is an arithmetic number, because the mean of its divisors is an integer number (61663246).

Almost surely, 2^123326491 is an apocalyptic number.

123326491 is a deficient number, since it is larger than the sum of its proper divisors (1).

123326491 is an equidigital number, since it uses as much as digits as its factorization.

123326491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 123326491 is about 11105.2461026310. The cubic root of 123326491 is about 497.7586221307.

It can be divided in two parts, 1233 and 26491, that multiplied together give a triangular number (32663403 = T₈₀₈₂).

The spelling of 123326491 in words is "one hundred twenty-three million, three hundred twenty-six thousand, four hundred ninety-one".