1244132689 has 2 divisors, whose sum is σ = 1244132690. Its totient is φ = 1244132688.

The previous prime is 1244132651. The next prime is 1244132693. The reversal of 1244132689 is 9862314421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1143792400 + 100340289 = 33820^2 + 10017^2 .

It is an emirp because it is prime and its reverse (9862314421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1244132689 - 2⁹ = 1244132177 is a prime.

It is a super-2 number, since 2×1244132689² = 3095732295676741442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1244132609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622066344 + 622066345.

It is an arithmetic number, because the mean of its divisors is an integer number (622066345).

Almost surely, 2^1244132689 is an apocalyptic number.

It is an amenable number.

1244132689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244132689 is an equidigital number, since it uses as much as digits as its factorization.

1244132689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 1244132689 is about 35272.2651526663. The cubic root of 1244132689 is about 1075.5292692830.

The spelling of 1244132689 in words is "one billion, two hundred forty-four million, one hundred thirty-two thousand, six hundred eighty-nine".