1017992491 has 2 divisors, whose sum is σ = 1017992492. Its totient is φ = 1017992490.

The previous prime is 1017992467. The next prime is 1017992513. The reversal of 1017992491 is 1942997101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1017992491 - 2⁹ = 1017991979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1017992401) 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, 508996245 + 508996246.

It is an arithmetic number, because the mean of its divisors is an integer number (508996246).

Almost surely, 2^1017992491 is an apocalyptic number.

1017992491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1017992491 is an equidigital number, since it uses as much as digits as its factorization.

1017992491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 1017992491 is about 31905.9945934929. The cubic root of 1017992491 is about 1005.9618823227.

The spelling of 1017992491 in words is "one billion, seventeen million, nine hundred ninety-two thousand, four hundred ninety-one".