1554540349 has 2 divisors, whose sum is σ = 1554540350. Its totient is φ = 1554540348.

The previous prime is 1554540313. The next prime is 1554540391. The reversal of 1554540349 is 9430454551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1161787225 + 392753124 = 34085^2 + 19818^2 .

It is a cyclic number.

It is not a de Polignac number, because 1554540349 - 2¹³ = 1554532157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1554540649) 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, 777270174 + 777270175.

It is an arithmetic number, because the mean of its divisors is an integer number (777270175).

Almost surely, 2^1554540349 is an apocalyptic number.

It is an amenable number.

1554540349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1554540349 is an equidigital number, since it uses as much as digits as its factorization.

1554540349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 40.

The square root of 1554540349 is about 39427.6596946864. The cubic root of 1554540349 is about 1158.4234302237.

The spelling of 1554540349 in words is "one billion, five hundred fifty-four million, five hundred forty thousand, three hundred forty-nine".