123903893 has 4 divisors (see below), whose sum is σ = 124171968. Its totient is φ = 123635820.

The previous prime is 123903839. The next prime is 123903907. The reversal of 123903893 is 398309321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 398309321 = 61 ⋅6529661.

It is a cyclic number.

It is not a de Polignac number, because 123903893 - 2²² = 119709589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123903833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133343 + ... + 134268.

It is an arithmetic number, because the mean of its divisors is an integer number (31042992).

Almost surely, 2^123903893 is an apocalyptic number.

It is an amenable number.

123903893 is a deficient number, since it is larger than the sum of its proper divisors (268075).

123903893 is an equidigital number, since it uses as much as digits as its factorization.

123903893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268074.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 123903893 is about 11131.2125574890. The cubic root of 123903893 is about 498.5342312428.

The spelling of 123903893 in words is "one hundred twenty-three million, nine hundred three thousand, eight hundred ninety-three".