123213403 has 4 divisors (see below), whose sum is σ = 123566800. Its totient is φ = 122860008.

The previous prime is 123213401. The next prime is 123213427. The reversal of 123213403 is 304312321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304312321 = 773 ⋅393677.

It is a cyclic number.

It is not a de Polignac number, because 123213403 - 2¹ = 123213401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123213401) 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, 176175 + ... + 176872.

It is an arithmetic number, because the mean of its divisors is an integer number (30891700).

Almost surely, 2^123213403 is an apocalyptic number.

123213403 is a deficient number, since it is larger than the sum of its proper divisors (353397).

123213403 is an equidigital number, since it uses as much as digits as its factorization.

123213403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353396.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 123213403 is about 11100.1532872299. The cubic root of 123213403 is about 497.6064306020.

Adding to 123213403 its reverse (304312321), we get a palindrome (427525724).

The spelling of 123213403 in words is "one hundred twenty-three million, two hundred thirteen thousand, four hundred three".