1554505489 has 2 divisors, whose sum is σ = 1554505490. Its totient is φ = 1554505488.

The previous prime is 1554505487. The next prime is 1554505549. The reversal of 1554505489 is 9845054551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1050278464 + 504227025 = 32408^2 + 22455^2 .

It is a cyclic number.

It is not a de Polignac number, because 1554505489 - 2¹ = 1554505487 is a prime.

It is a super-2 number, since 2×1554505489² = 4832974630662258242, which contains 22 as substring.

Together with 1554505487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1554505481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777252744 + 777252745.

It is an arithmetic number, because the mean of its divisors is an integer number (777252745).

Almost surely, 2^1554505489 is an apocalyptic number.

It is an amenable number.

1554505489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1554505489 is an equidigital number, since it uses as much as digits as its factorization.

1554505489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720000, while the sum is 46.

The square root of 1554505489 is about 39427.2176167682. The cubic root of 1554505489 is about 1158.4147710848.

The spelling of 1554505489 in words is "one billion, five hundred fifty-four million, five hundred five thousand, four hundred eighty-nine".