1554342649 has 2 divisors, whose sum is σ = 1554342650. Its totient is φ = 1554342648.

The previous prime is 1554342539. The next prime is 1554342653. The reversal of 1554342649 is 9462434551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1280208400 + 274134249 = 35780^2 + 16557^2 .

It is an emirp because it is prime and its reverse (9462434551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1554342649 - 2⁹ = 1554342137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1554342949) 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, 777171324 + 777171325.

It is an arithmetic number, because the mean of its divisors is an integer number (777171325).

Almost surely, 2^1554342649 is an apocalyptic number.

It is an amenable number.

1554342649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1554342649 is an equidigital number, since it uses as much as digits as its factorization.

1554342649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 43.

The square root of 1554342649 is about 39425.1524917786. The cubic root of 1554342649 is about 1158.3743203113.

The spelling of 1554342649 in words is "one billion, five hundred fifty-four million, three hundred forty-two thousand, six hundred forty-nine".