1289522493 has 48 divisors (see below), whose sum is σ = 2172666496. Its totient is φ = 721768320.

The previous prime is 1289522477. The next prime is 1289522527. The reversal of 1289522493 is 3942259821.

1289522493 is a `hidden beast` number, since 1 + 2 + 89 + 522 + 49 + 3 = 666.

It is not a de Polignac number, because 1289522493 - 2⁴ = 1289522477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289522453) 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 in 47 ways as a sum of consecutive naturals, for example, 1179255 + ... + 1180347.

Almost surely, 2^1289522493 is an apocalyptic number.

It is an amenable number.

1289522493 is a deficient number, since it is larger than the sum of its proper divisors (883144003).

1289522493 is a wasteful number, since it uses less digits than its factorization.

1289522493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474 (or 1471 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 1289522493 is about 35909.9219297397. The cubic root of 1289522493 is about 1088.4528995577.

The spelling of 1289522493 in words is "one billion, two hundred eighty-nine million, five hundred twenty-two thousand, four hundred ninety-three".