1026894991 has 2 divisors, whose sum is σ = 1026894992. Its totient is φ = 1026894990.

The previous prime is 1026894971. The next prime is 1026895019. The reversal of 1026894991 is 1994986201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1026894991 - 2¹⁵ = 1026862223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1026894971) 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, 513447495 + 513447496.

It is an arithmetic number, because the mean of its divisors is an integer number (513447496).

Almost surely, 2^1026894991 is an apocalyptic number.

1026894991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1026894991 is an equidigital number, since it uses as much as digits as its factorization.

1026894991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 1026894991 is about 32045.2023086140. The cubic root of 1026894991 is about 1008.8858055919.

The spelling of 1026894991 in words is "one billion, twenty-six million, eight hundred ninety-four thousand, nine hundred ninety-one".