123640411 has 2 divisors, whose sum is σ = 123640412. Its totient is φ = 123640410.

The previous prime is 123640403. The next prime is 123640423. The reversal of 123640411 is 114046321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123640411 - 2³ = 123640403 is a prime.

It is not a weakly prime, because it can be changed into another prime (123640441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61820205 + 61820206.

It is an arithmetic number, because the mean of its divisors is an integer number (61820206).

Almost surely, 2^123640411 is an apocalyptic number.

123640411 is a deficient number, since it is larger than the sum of its proper divisors (1).

123640411 is an equidigital number, since it uses as much as digits as its factorization.

123640411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 123640411 is about 11119.3709804107. The cubic root of 123640411 is about 498.1806022807.

Adding to 123640411 its reverse (114046321), we get a palindrome (237686732).

The spelling of 123640411 in words is "one hundred twenty-three million, six hundred forty thousand, four hundred eleven".