1026321649 has 2 divisors, whose sum is σ = 1026321650. Its totient is φ = 1026321648.

The previous prime is 1026321589. The next prime is 1026321661. The reversal of 1026321649 is 9461236201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 925680625 + 100641024 = 30425^2 + 10032^2 .

It is a cyclic number.

It is not a de Polignac number, because 1026321649 - 2⁹ = 1026321137 is a prime.

It is a super-2 number, since 2×1026321649² = 2106672254412158402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1026321949) 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, 513160824 + 513160825.

It is an arithmetic number, because the mean of its divisors is an integer number (513160825).

Almost surely, 2^1026321649 is an apocalyptic number.

It is an amenable number.

1026321649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1026321649 is an equidigital number, since it uses as much as digits as its factorization.

1026321649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 1026321649 is about 32036.2552274763. The cubic root of 1026321649 is about 1008.6980083013.

The spelling of 1026321649 in words is "one billion, twenty-six million, three hundred twenty-one thousand, six hundred forty-nine".