123243613 has 2 divisors, whose sum is σ = 123243614. Its totient is φ = 123243612.

The previous prime is 123243539. The next prime is 123243667. The reversal of 123243613 is 316342321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94051204 + 29192409 = 9698^2 + 5403^2 .

It is a cyclic number.

It is not a de Polignac number, because 123243613 - 2¹³ = 123235421 is a prime.

It is equal to p_7015750 and since 123243613 and 7015750 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123243313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61621806 + 61621807.

It is an arithmetic number, because the mean of its divisors is an integer number (61621807).

Almost surely, 2^123243613 is an apocalyptic number.

It is an amenable number.

123243613 is a deficient number, since it is larger than the sum of its proper divisors (1).

123243613 is an equidigital number, since it uses as much as digits as its factorization.

123243613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 25.

The square root of 123243613 is about 11101.5139958476. The cubic root of 123243613 is about 497.6470957176.

Adding to 123243613 its reverse (316342321), we get a palindrome (439585934).

The spelling of 123243613 in words is "one hundred twenty-three million, two hundred forty-three thousand, six hundred thirteen".