123811447 has 2 divisors, whose sum is σ = 123811448. Its totient is φ = 123811446.

The previous prime is 123811417. The next prime is 123811451. The reversal of 123811447 is 744118321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123811447 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123811417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61905723 + 61905724.

It is an arithmetic number, because the mean of its divisors is an integer number (61905724).

Almost surely, 2^123811447 is an apocalyptic number.

123811447 is a deficient number, since it is larger than the sum of its proper divisors (1).

123811447 is an equidigital number, since it uses as much as digits as its factorization.

123811447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 123811447 is about 11127.0592251502. The cubic root of 123811447 is about 498.4102131798.

Adding to 123811447 its reverse (744118321), we get a palindrome (867929768).

The spelling of 123811447 in words is "one hundred twenty-three million, eight hundred eleven thousand, four hundred forty-seven".