13243961 has 2 divisors, whose sum is σ = 13243962. Its totient is φ = 13243960.

The previous prime is 13243933. The next prime is 13243963. The reversal of 13243961 is 16934231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12033961 + 1210000 = 3469^2 + 1100^2 .

It is a cyclic number.

It is not a de Polignac number, because 13243961 - 2⁶ = 13243897 is a prime.

Together with 13243963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13243963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6621980 + 6621981.

It is an arithmetic number, because the mean of its divisors is an integer number (6621981).

Almost surely, 2^13243961 is an apocalyptic number.

It is an amenable number.

13243961 is a deficient number, since it is larger than the sum of its proper divisors (1).

13243961 is an equidigital number, since it uses as much as digits as its factorization.

13243961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The square root of 13243961 is about 3639.2253296547. The cubic root of 13243961 is about 236.5952190155.

The spelling of 13243961 in words is "thirteen million, two hundred forty-three thousand, nine hundred sixty-one".