123213427 has 2 divisors, whose sum is σ = 123213428. Its totient is φ = 123213426.

The previous prime is 123213401. The next prime is 123213439. The reversal of 123213427 is 724312321.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (724312321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123213427 - 2¹⁹ = 122689139 is a prime.

It is not a weakly prime, because it can be changed into another prime (123217427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61606713 + 61606714.

It is an arithmetic number, because the mean of its divisors is an integer number (61606714).

Almost surely, 2^123213427 is an apocalyptic number.

123213427 is a deficient number, since it is larger than the sum of its proper divisors (1).

123213427 is an equidigital number, since it uses as much as digits as its factorization.

123213427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 25.

The square root of 123213427 is about 11100.1543682960. The cubic root of 123213427 is about 497.6064629106.

Adding to 123213427 its reverse (724312321), we get a palindrome (847525748).

The spelling of 123213427 in words is "one hundred twenty-three million, two hundred thirteen thousand, four hundred twenty-seven".