123257447 has 2 divisors, whose sum is σ = 123257448. Its totient is φ = 123257446.

The previous prime is 123257441. The next prime is 123257501. The reversal of 123257447 is 744752321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123257447 - 2¹⁰ = 123256423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123257441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61628723 + 61628724.

It is an arithmetic number, because the mean of its divisors is an integer number (61628724).

Almost surely, 2^123257447 is an apocalyptic number.

123257447 is a deficient number, since it is larger than the sum of its proper divisors (1).

123257447 is an equidigital number, since it uses as much as digits as its factorization.

123257447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 35.

The square root of 123257447 is about 11102.1370465330. The cubic root of 123257447 is about 497.6657151878.

The spelling of 123257447 in words is "one hundred twenty-three million, two hundred fifty-seven thousand, four hundred forty-seven".