1000004491 has 4 divisors (see below), whose sum is σ = 1002523792. Its totient is φ = 997485192.

The previous prime is 1000004459. The next prime is 1000004497. The reversal of 1000004491 is 1944000001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1944000001 = 73 ⋅26630137.

It is a cyclic number.

It is not a de Polignac number, because 1000004491 - 2⁵ = 1000004459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000004497) 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 3 ways as a sum of consecutive naturals, for example, 1259055 + ... + 1259848.

It is an arithmetic number, because the mean of its divisors is an integer number (250630948).

Almost surely, 2^1000004491 is an apocalyptic number.

1000004491 is a deficient number, since it is larger than the sum of its proper divisors (2519301).

1000004491 is an equidigital number, since it uses as much as digits as its factorization.

1000004491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2519300.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1000004491 is about 31622.8476105489. The cubic root of 1000004491 is about 1000.0014969978.

Adding to 1000004491 its reverse (1944000001), we get a palindrome (2944004492).

The spelling of 1000004491 in words is "one billion, four thousand, four hundred ninety-one".