1553103449 has 2 divisors, whose sum is σ = 1553103450. Its totient is φ = 1553103448.

The previous prime is 1553103401. The next prime is 1553103457. The reversal of 1553103449 is 9443013551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1056705049 + 496398400 = 32507^2 + 22280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1553103449 is a prime.

It is not a weakly prime, because it can be changed into another prime (1553103479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776551724 + 776551725.

It is an arithmetic number, because the mean of its divisors is an integer number (776551725).

Almost surely, 2^1553103449 is an apocalyptic number.

It is an amenable number.

1553103449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1553103449 is an equidigital number, since it uses as much as digits as its factorization.

1553103449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 1553103449 is about 39409.4335026526. The cubic root of 1553103449 is about 1158.0664004111.

The spelling of 1553103449 in words is "one billion, five hundred fifty-three million, one hundred three thousand, four hundred forty-nine".