123947 has 8 divisors (see below), whose sum is σ = 137376. Its totient is φ = 111232.

The previous prime is 123941. The next prime is 123953. The reversal of 123947 is 749321.

It is an interprime number because it is at equal distance from previous prime (123941) and next prime (123953).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123947 - 2⁴ = 123931 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a zygodrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (123941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233 + ... + 549.

It is an arithmetic number, because the mean of its divisors is an integer number (17172).

2¹²³⁹⁴⁷ is an apocalyptic number.

123947 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

123947 is a deficient number, since it is larger than the sum of its proper divisors (13429).

123947 is a wasteful number, since it uses less digits than its factorization.

123947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357.

The product of its digits is 1512, while the sum is 26.

The square root of 123947 is about 352.0610742471. The cubic root of 123947 is about 49.8592039013.

The spelling of 123947 in words is "one hundred twenty-three thousand, nine hundred forty-seven".