123040213 has 2 divisors, whose sum is σ = 123040214. Its totient is φ = 123040212.

The previous prime is 123040201. The next prime is 123040241. The reversal of 123040213 is 312040321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122036209 + 1004004 = 11047^2 + 1002^2 .

It is a cyclic number.

It is not a de Polignac number, because 123040213 - 2⁹ = 123039701 is a prime.

It is a super-4 number, since 4×123040213⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123040273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61520106 + 61520107.

It is an arithmetic number, because the mean of its divisors is an integer number (61520107).

Almost surely, 2^123040213 is an apocalyptic number.

It is an amenable number.

123040213 is a deficient number, since it is larger than the sum of its proper divisors (1).

123040213 is an equidigital number, since it uses as much as digits as its factorization.

123040213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 123040213 is about 11092.3493003060. The cubic root of 123040213 is about 497.3731744088.

Adding to 123040213 its reverse (312040321), we get a palindrome (435080534).

The spelling of 123040213 in words is "one hundred twenty-three million, forty thousand, two hundred thirteen".