123213434 has 4 divisors (see below), whose sum is σ = 184820154. Its totient is φ = 61606716.

The previous prime is 123213427. The next prime is 123213439. The reversal of 123213434 is 434312321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 122036209 + 1177225 = 11047^2 + 1085^2 .

It is not an unprimeable number, because it can be changed into a prime (123213439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30803357 + ... + 30803360.

Almost surely, 2^123213434 is an apocalyptic number.

123213434 is a deficient number, since it is larger than the sum of its proper divisors (61606720).

123213434 is an equidigital number, since it uses as much as digits as its factorization.

123213434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61606719.

The product of its digits is 1728, while the sum is 23.

The square root of 123213434 is about 11100.1546836069. The cubic root of 123213434 is about 497.6064723339.

Adding to 123213434 its reverse (434312321), we get a palindrome (557525755).

The spelling of 123213434 in words is "one hundred twenty-three million, two hundred thirteen thousand, four hundred thirty-four".