1040430191 has 2 divisors, whose sum is σ = 1040430192. Its totient is φ = 1040430190.

The previous prime is 1040430133. The next prime is 1040430217. The reversal of 1040430191 is 1910340401.

It is a strong prime.

It is an emirp because it is prime and its reverse (1910340401) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1040430191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040435191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520215095 + 520215096.

It is an arithmetic number, because the mean of its divisors is an integer number (520215096).

Almost surely, 2^1040430191 is an apocalyptic number.

1040430191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040430191 is an equidigital number, since it uses as much as digits as its factorization.

1040430191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1040430191 is about 32255.7001319147. The cubic root of 1040430191 is about 1013.2990807352.

Adding to 1040430191 its reverse (1910340401), we get a palindrome (2950770592).

The spelling of 1040430191 in words is "one billion, forty million, four hundred thirty thousand, one hundred ninety-one".