1553811349 has 2 divisors, whose sum is σ = 1553811350. Its totient is φ = 1553811348.

The previous prime is 1553811331. The next prime is 1553811353. The reversal of 1553811349 is 9431183551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1123456324 + 430355025 = 33518^2 + 20745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1553811349 - 2⁷ = 1553811221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1553814349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776905674 + 776905675.

It is an arithmetic number, because the mean of its divisors is an integer number (776905675).

Almost surely, 2^1553811349 is an apocalyptic number.

It is an amenable number.

1553811349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1553811349 is an equidigital number, since it uses as much as digits as its factorization.

1553811349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 40.

The square root of 1553811349 is about 39418.4138316092. The cubic root of 1553811349 is about 1158.2423214428.

The spelling of 1553811349 in words is "one billion, five hundred fifty-three million, eight hundred eleven thousand, three hundred forty-nine".