126644489 has 2 divisors, whose sum is σ = 126644490. Its totient is φ = 126644488.

The previous prime is 126644459. The next prime is 126644501. The reversal of 126644489 is 984446621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86638864 + 40005625 = 9308^2 + 6325^2 .

It is a cyclic number.

It is not a de Polignac number, because 126644489 - 2²⁴ = 109867273 is a prime.

It is a super-2 number, since 2×126644489² = 32077653188142242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (126644459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63322244 + 63322245.

It is an arithmetic number, because the mean of its divisors is an integer number (63322245).

Almost surely, 2^126644489 is an apocalyptic number.

It is an amenable number.

126644489 is a deficient number, since it is larger than the sum of its proper divisors (1).

126644489 is an equidigital number, since it uses as much as digits as its factorization.

126644489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 44.

The square root of 126644489 is about 11253.6433655950. The cubic root of 126644489 is about 502.1831062217.

The spelling of 126644489 in words is "one hundred twenty-six million, six hundred forty-four thousand, four hundred eighty-nine".