1244475553 has 2 divisors, whose sum is σ = 1244475554. Its totient is φ = 1244475552.

The previous prime is 1244475527. The next prime is 1244475569. The reversal of 1244475553 is 3555744421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 717864849 + 526610704 = 26793^2 + 22948^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244475553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1244475593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622237776 + 622237777.

It is an arithmetic number, because the mean of its divisors is an integer number (622237777).

Almost surely, 2^1244475553 is an apocalyptic number.

It is an amenable number.

1244475553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244475553 is an equidigital number, since it uses as much as digits as its factorization.

1244475553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336000, while the sum is 40.

The square root of 1244475553 is about 35277.1250671026. The cubic root of 1244475553 is about 1075.6280600312.

The spelling of 1244475553 in words is "one billion, two hundred forty-four million, four hundred seventy-five thousand, five hundred fifty-three".