123988943 has 4 divisors (see below), whose sum is σ = 133526568. Its totient is φ = 114451320.

The previous prime is 123988937. The next prime is 123988951. The reversal of 123988943 is 349889321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 349889321 = 29 ⋅12065149.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123988943 is a prime.

It is a super-4 number, since 4×123988943⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123988903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4768793 + ... + 4768818.

It is an arithmetic number, because the mean of its divisors is an integer number (33381642).

Almost surely, 2^123988943 is an apocalyptic number.

123988943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

123988943 is a deficient number, since it is larger than the sum of its proper divisors (9537625).

123988943 is an equidigital number, since it uses as much as digits as its factorization.

123988943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9537624.

The product of its digits is 373248, while the sum is 47.

The square root of 123988943 is about 11135.0322406359. The cubic root of 123988943 is about 498.6482729611.

The spelling of 123988943 in words is "one hundred twenty-three million, nine hundred eighty-eight thousand, nine hundred forty-three".