123123547 has 2 divisors, whose sum is σ = 123123548. Its totient is φ = 123123546.

The previous prime is 123123541. The next prime is 123123563. The reversal of 123123547 is 745321321.

It is a weak prime.

It is an emirp because it is prime and its reverse (745321321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123123547 is a prime.

It is a super-2 number, since 2×123123547² = 30318815651722418, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123123541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61561773 + 61561774.

It is an arithmetic number, because the mean of its divisors is an integer number (61561774).

Almost surely, 2^123123547 is an apocalyptic number.

123123547 is a deficient number, since it is larger than the sum of its proper divisors (1).

123123547 is an equidigital number, since it uses as much as digits as its factorization.

123123547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 123123547 is about 11096.1050373543. The cubic root of 123123547 is about 497.4854378203.

Adding to 123123547 its reverse (745321321), we get a palindrome (868444868).

The spelling of 123123547 in words is "one hundred twenty-three million, one hundred twenty-three thousand, five hundred forty-seven".