123428647 has 2 divisors, whose sum is σ = 123428648. Its totient is φ = 123428646.

The previous prime is 123428629. The next prime is 123428651. The reversal of 123428647 is 746824321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123428647 - 2¹⁵ = 123395879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123422647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61714323 + 61714324.

It is an arithmetic number, because the mean of its divisors is an integer number (61714324).

Almost surely, 2^123428647 is an apocalyptic number.

123428647 is a deficient number, since it is larger than the sum of its proper divisors (1).

123428647 is an equidigital number, since it uses as much as digits as its factorization.

123428647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 37.

The square root of 123428647 is about 11109.8445983731. The cubic root of 123428647 is about 497.8960216351.

The spelling of 123428647 in words is "one hundred twenty-three million, four hundred twenty-eight thousand, six hundred forty-seven".