123282391 has 2 divisors, whose sum is σ = 123282392. Its totient is φ = 123282390.

The previous prime is 123282389. The next prime is 123282421. The reversal of 123282391 is 193282321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123282391 - 2¹ = 123282389 is a prime.

Together with 123282389, it forms a pair of twin primes.

It is equal to p_7017880 and since 123282391 and 7017880 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123282301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61641195 + 61641196.

It is an arithmetic number, because the mean of its divisors is an integer number (61641196).

Almost surely, 2^123282391 is an apocalyptic number.

123282391 is a deficient number, since it is larger than the sum of its proper divisors (1).

123282391 is an equidigital number, since it uses as much as digits as its factorization.

123282391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 123282391 is about 11103.2603770244. The cubic root of 123282391 is about 497.6992843192.

The spelling of 123282391 in words is "one hundred twenty-three million, two hundred eighty-two thousand, three hundred ninety-one".