1006644091 has 2 divisors, whose sum is σ = 1006644092. Its totient is φ = 1006644090.

The previous prime is 1006644049. The next prime is 1006644101. The reversal of 1006644091 is 1904466001.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1006644091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1006644391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 503322045 + 503322046.

It is an arithmetic number, because the mean of its divisors is an integer number (503322046).

Almost surely, 2^1006644091 is an apocalyptic number.

1006644091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1006644091 is an equidigital number, since it uses as much as digits as its factorization.

1006644091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1006644091 is about 31727.6549874081. The cubic root of 1006644091 is about 1002.2098101421.

The spelling of 1006644091 in words is "one billion, six million, six hundred forty-four thousand, ninety-one".