123777403 has 4 divisors (see below), whose sum is σ = 124399600. Its totient is φ = 123155208.

The previous prime is 123777377. The next prime is 123777491. The reversal of 123777403 is 304777321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304777321 = 197 ⋅1547093.

It is a cyclic number.

It is not a de Polignac number, because 123777403 - 2²⁵ = 90222971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123717403) 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, 310800 + ... + 311197.

It is an arithmetic number, because the mean of its divisors is an integer number (31099900).

Almost surely, 2^123777403 is an apocalyptic number.

123777403 is a deficient number, since it is larger than the sum of its proper divisors (622197).

123777403 is an equidigital number, since it uses as much as digits as its factorization.

123777403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622196.

The product of its (nonzero) digits is 24696, while the sum is 34.

The square root of 123777403 is about 11125.5293357215. The cubic root of 123777403 is about 498.3645269552.

The spelling of 123777403 in words is "one hundred twenty-three million, seven hundred seventy-seven thousand, four hundred three".