1040191913 has 2 divisors, whose sum is σ = 1040191914. Its totient is φ = 1040191912.

The previous prime is 1040191907. The next prime is 1040191927. The reversal of 1040191913 is 3191910401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 767677849 + 272514064 = 27707^2 + 16508^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040191913 - 2¹⁰ = 1040190889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1040190913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520095956 + 520095957.

It is an arithmetic number, because the mean of its divisors is an integer number (520095957).

Almost surely, 2^1040191913 is an apocalyptic number.

It is an amenable number.

1040191913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040191913 is an equidigital number, since it uses as much as digits as its factorization.

1040191913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 1040191913 is about 32252.0063406914. The cubic root of 1040191913 is about 1013.2217200067.

The spelling of 1040191913 in words is "one billion, forty million, one hundred ninety-one thousand, nine hundred thirteen".