1548453989 has 4 divisors (see below), whose sum is σ = 1577670156. Its totient is φ = 1519237824.

The previous prime is 1548453979. The next prime is 1548454007. The reversal of 1548453989 is 9893548451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1318416100 + 230037889 = 36310^2 + 15167^2 .

It is a cyclic number.

It is not a de Polignac number, because 1548453989 - 2¹⁶ = 1548388453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1548453979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14608004 + ... + 14608109.

It is an arithmetic number, because the mean of its divisors is an integer number (394417539).

Almost surely, 2^1548453989 is an apocalyptic number.

It is an amenable number.

1548453989 is a deficient number, since it is larger than the sum of its proper divisors (29216167).

1548453989 is an equidigital number, since it uses as much as digits as its factorization.

1548453989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29216166.

The product of its digits is 6220800, while the sum is 56.

The square root of 1548453989 is about 39350.4001123241. The cubic root of 1548453989 is about 1156.9096272068.

The spelling of 1548453989 in words is "one billion, five hundred forty-eight million, four hundred fifty-three thousand, nine hundred eighty-nine".