123778403 has 8 divisors (see below), whose sum is σ = 141528672. Its totient is φ = 106045056.

The previous prime is 123778399. The next prime is 123778423. The reversal of 123778403 is 304877321.

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 123778403 - 2² = 123778399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123778423) 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, 24251 + ... + 28907.

It is an arithmetic number, because the mean of its divisors is an integer number (17691084).

Almost surely, 2^123778403 is an apocalyptic number.

123778403 is a deficient number, since it is larger than the sum of its proper divisors (17750269).

123778403 is an equidigital number, since it uses as much as digits as its factorization.

123778403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8461.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 123778403 is about 11125.5742773126. The cubic root of 123778403 is about 498.3658690504.

The spelling of 123778403 in words is "one hundred twenty-three million, seven hundred seventy-eight thousand, four hundred three".