1540849589 has 4 divisors (see below), whose sum is σ = 1545214956. Its totient is φ = 1536484224.

The previous prime is 1540849579. The next prime is 1540849591. The reversal of 1540849589 is 9859480451.

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 912946225 + 627903364 = 30215^2 + 25058^2 .

It is a cyclic number.

It is not a de Polignac number, because 1540849589 - 2²⁰ = 1539801013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1540849589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540849529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2182154 + ... + 2182859.

It is an arithmetic number, because the mean of its divisors is an integer number (386303739).

Almost surely, 2^1540849589 is an apocalyptic number.

It is an amenable number.

1540849589 is a deficient number, since it is larger than the sum of its proper divisors (4365367).

1540849589 is an equidigital number, since it uses as much as digits as its factorization.

1540849589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4365366.

The product of its (nonzero) digits is 2073600, while the sum is 53.

The square root of 1540849589 is about 39253.6570143471. The cubic root of 1540849589 is about 1155.0126717874.

The spelling of 1540849589 in words is "one billion, five hundred forty million, eight hundred forty-nine thousand, five hundred eighty-nine".