1489991409 has 32 divisors (see below), whose sum is σ = 2331648000. Its totient is φ = 938906640.

The previous prime is 1489991383. The next prime is 1489991423. The reversal of 1489991409 is 9041999841.

1489991409 is a `hidden beast` number, since 148 + 9 + 9 + 91 + 409 = 666.

It is not a de Polignac number, because 1489991409 - 2¹⁶ = 1489925873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1489991479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15292 + ... + 56690.

It is an arithmetic number, because the mean of its divisors is an integer number (72864000).

Almost surely, 2^1489991409 is an apocalyptic number.

It is an amenable number.

1489991409 is a deficient number, since it is larger than the sum of its proper divisors (841656591).

1489991409 is a wasteful number, since it uses less digits than its factorization.

1489991409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41482 (or 41476 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The square root of 1489991409 is about 38600.4068501875. The cubic root of 1489991409 is about 1142.1625640274.

The spelling of 1489991409 in words is "one billion, four hundred eighty-nine million, nine hundred ninety-one thousand, four hundred nine".