1244545397 has 2 divisors, whose sum is σ = 1244545398. Its totient is φ = 1244545396.

The previous prime is 1244545361. The next prime is 1244545427. The reversal of 1244545397 is 7935454421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 675532081 + 569013316 = 25991^2 + 23854^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244545397 - 2¹² = 1244541301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244544397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622272698 + 622272699.

It is an arithmetic number, because the mean of its divisors is an integer number (622272699).

Almost surely, 2^1244545397 is an apocalyptic number.

It is an amenable number.

1244545397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244545397 is an equidigital number, since it uses as much as digits as its factorization.

1244545397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 44.

The square root of 1244545397 is about 35278.1149864899. The cubic root of 1244545397 is about 1075.6481822320.

The spelling of 1244545397 in words is "one billion, two hundred forty-four million, five hundred forty-five thousand, three hundred ninety-seven".