1213626149 has 2 divisors, whose sum is σ = 1213626150. Its totient is φ = 1213626148.

The previous prime is 1213626137. The next prime is 1213626173. The reversal of 1213626149 is 9416263121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1009650625 + 203975524 = 31775^2 + 14282^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213626149 - 2²⁸ = 945190693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213626749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606813074 + 606813075.

It is an arithmetic number, because the mean of its divisors is an integer number (606813075).

Almost surely, 2^1213626149 is an apocalyptic number.

It is an amenable number.

1213626149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213626149 is an equidigital number, since it uses as much as digits as its factorization.

1213626149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 1213626149 is about 34837.1374972170. The cubic root of 1213626149 is about 1066.6656469500.

The spelling of 1213626149 in words is "one billion, two hundred thirteen million, six hundred twenty-six thousand, one hundred forty-nine".