126613213 has 2 divisors, whose sum is σ = 126613214. Its totient is φ = 126613212.

The previous prime is 126613187. The next prime is 126613231. The reversal of 126613213 is 312316621.

Together with next prime (126613231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123609924 + 3003289 = 11118^2 + 1733^2 .

It is an emirp because it is prime and its reverse (312316621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126613213 - 2⁵ = 126613181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126613313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63306606 + 63306607.

It is an arithmetic number, because the mean of its divisors is an integer number (63306607).

Almost surely, 2^126613213 is an apocalyptic number.

It is an amenable number.

126613213 is a deficient number, since it is larger than the sum of its proper divisors (1).

126613213 is an equidigital number, since it uses as much as digits as its factorization.

126613213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 126613213 is about 11252.2536853734. The cubic root of 126613213 is about 502.1417632674.

Adding to 126613213 its reverse (312316621), we get a palindrome (438929834).

The spelling of 126613213 in words is "one hundred twenty-six million, six hundred thirteen thousand, two hundred thirteen".