123136471 has 2 divisors, whose sum is σ = 123136472. Its totient is φ = 123136470.

The previous prime is 123136451. The next prime is 123136493. The reversal of 123136471 is 174631321.

It is a weak prime.

It is an emirp because it is prime and its reverse (174631321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123136471 - 2⁹ = 123135959 is a prime.

It is a super-3 number, since 3×123136471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123136451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61568235 + 61568236.

It is an arithmetic number, because the mean of its divisors is an integer number (61568236).

Almost surely, 2^123136471 is an apocalyptic number.

123136471 is a deficient number, since it is larger than the sum of its proper divisors (1).

123136471 is an equidigital number, since it uses as much as digits as its factorization.

123136471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 123136471 is about 11096.6873885858. The cubic root of 123136471 is about 497.5028438513.

Adding to 123136471 its reverse (174631321), we get a palindrome (297767792).

The spelling of 123136471 in words is "one hundred twenty-three million, one hundred thirty-six thousand, four hundred seventy-one".