123781403 has 8 divisors (see below), whose sum is σ = 131589360. Its totient is φ = 116032000.

The previous prime is 123781397. The next prime is 123781429. The reversal of 123781403 is 304187321.

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 123781403 - 2¹⁰ = 123780379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123781433) 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, 10238 + ... + 18771.

It is an arithmetic number, because the mean of its divisors is an integer number (16448670).

Almost surely, 2^123781403 is an apocalyptic number.

123781403 is a deficient number, since it is larger than the sum of its proper divisors (7807957).

123781403 is a wasteful number, since it uses less digits than its factorization.

123781403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29277.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 123781403 is about 11125.7091009967. The cubic root of 123781403 is about 498.3698952927.

The spelling of 123781403 in words is "one hundred twenty-three million, seven hundred eighty-one thousand, four hundred three".