126670013 has 2 divisors, whose sum is σ = 126670014. Its totient is φ = 126670012.

The previous prime is 126670003. The next prime is 126670031. The reversal of 126670013 is 310076621.

Together with next prime (126670031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117440569 + 9229444 = 10837^2 + 3038^2 .

It is a cyclic number.

It is not a de Polignac number, because 126670013 - 2⁸ = 126669757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126670003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63335006 + 63335007.

It is an arithmetic number, because the mean of its divisors is an integer number (63335007).

Almost surely, 2^126670013 is an apocalyptic number.

It is an amenable number.

126670013 is a deficient number, since it is larger than the sum of its proper divisors (1).

126670013 is an equidigital number, since it uses as much as digits as its factorization.

126670013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 126670013 is about 11254.7773412005. Note that the first 3 decimals coincide. The cubic root of 126670013 is about 502.2168407087.

The spelling of 126670013 in words is "one hundred twenty-six million, six hundred seventy thousand, thirteen".