123440413 has 2 divisors, whose sum is σ = 123440414. Its totient is φ = 123440412.

The previous prime is 123440363. The next prime is 123440431. The reversal of 123440413 is 314044321.

Together with next prime (123440431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101566084 + 21874329 = 10078^2 + 4677^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123440413 is a prime.

It is a super-2 number, since 2×123440413² = 30475071123221138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123440113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61720206 + 61720207.

It is an arithmetic number, because the mean of its divisors is an integer number (61720207).

Almost surely, 2^123440413 is an apocalyptic number.

It is an amenable number.

123440413 is a deficient number, since it is larger than the sum of its proper divisors (1).

123440413 is an equidigital number, since it uses as much as digits as its factorization.

123440413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 123440413 is about 11110.3741161133. The cubic root of 123440413 is about 497.9118419993.

Adding to 123440413 its reverse (314044321), we get a palindrome (437484734).

The spelling of 123440413 in words is "one hundred twenty-three million, four hundred forty thousand, four hundred thirteen".