123954647 has 4 divisors (see below), whose sum is σ = 127953216. Its totient is φ = 119956080.

The previous prime is 123954637. The next prime is 123954653. The reversal of 123954647 is 746459321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746459321 = 18229 ⋅40949.

It is a cyclic number.

It is not a de Polignac number, because 123954647 - 2⁴ = 123954631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123954637) 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 in 3 ways as a sum of consecutive naturals, for example, 1999238 + ... + 1999299.

It is an arithmetic number, because the mean of its divisors is an integer number (31988304).

Almost surely, 2^123954647 is an apocalyptic number.

123954647 is a deficient number, since it is larger than the sum of its proper divisors (3998569).

123954647 is an equidigital number, since it uses as much as digits as its factorization.

123954647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3998568.

The product of its digits is 181440, while the sum is 41.

The square root of 123954647 is about 11133.4921296061. The cubic root of 123954647 is about 498.6022924680.

The spelling of 123954647 in words is "one hundred twenty-three million, nine hundred fifty-four thousand, six hundred forty-seven".