1004199991 has 2 divisors, whose sum is σ = 1004199992. Its totient is φ = 1004199990.

The previous prime is 1004199971. The next prime is 1004200039. The reversal of 1004199991 is 1999914001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1004199991 - 2¹⁵ = 1004167223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1004199961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502099995 + 502099996.

It is an arithmetic number, because the mean of its divisors is an integer number (502099996).

Almost surely, 2^1004199991 is an apocalyptic number.

1004199991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004199991 is an equidigital number, since it uses as much as digits as its factorization.

1004199991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 43.

The square root of 1004199991 is about 31689.1147083663. The cubic root of 1004199991 is about 1001.3980415689.

The spelling of 1004199991 in words is "one billion, four million, one hundred ninety-nine thousand, nine hundred ninety-one".