1006784891 has 4 divisors (see below), whose sum is σ = 1150611312. Its totient is φ = 862958472.

The previous prime is 1006784879. The next prime is 1006784893. The reversal of 1006784891 is 1984876001.

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

It is a cyclic number.

It is not a de Polignac number, because 1006784891 - 2¹⁸ = 1006522747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1006784893) 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, 71913200 + ... + 71913213.

It is an arithmetic number, because the mean of its divisors is an integer number (287652828).

Almost surely, 2^1006784891 is an apocalyptic number.

1006784891 is a deficient number, since it is larger than the sum of its proper divisors (143826421).

1006784891 is an equidigital number, since it uses as much as digits as its factorization.

1006784891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143826420.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 1006784891 is about 31729.8737942652. The cubic root of 1006784891 is about 1002.2565345551.

The spelling of 1006784891 in words is "one billion, six million, seven hundred eighty-four thousand, eight hundred ninety-one".