13123247 has 2 divisors, whose sum is σ = 13123248. Its totient is φ = 13123246.

The previous prime is 13123237. The next prime is 13123249. The reversal of 13123247 is 74232131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13123247 - 2⁶ = 13123183 is a prime.

It is a super-2 number, since 2×13123247² = 344439223646018, which contains 22 as substring.

Together with 13123249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13123249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6561623 + 6561624.

It is an arithmetic number, because the mean of its divisors is an integer number (6561624).

Almost surely, 2^13123247 is an apocalyptic number.

13123247 is a deficient number, since it is larger than the sum of its proper divisors (1).

13123247 is an equidigital number, since it uses as much as digits as its factorization.

13123247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 23.

The square root of 13123247 is about 3622.6022414833. The cubic root of 13123247 is about 235.8741968117.

Adding to 13123247 its reverse (74232131), we get a palindrome (87355378).

The spelling of 13123247 in words is "thirteen million, one hundred twenty-three thousand, two hundred forty-seven".