1040643361 has 2 divisors, whose sum is σ = 1040643362. Its totient is φ = 1040643360.

The previous prime is 1040643311. The next prime is 1040643449. The reversal of 1040643361 is 1633460401.

1040643361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 941262400 + 99380961 = 30680^2 + 9969^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040643361 - 2²⁹ = 503772449 is a prime.

It is not a weakly prime, because it can be changed into another prime (1040643311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520321680 + 520321681.

It is an arithmetic number, because the mean of its divisors is an integer number (520321681).

Almost surely, 2^1040643361 is an apocalyptic number.

It is an amenable number.

1040643361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040643361 is an equidigital number, since it uses as much as digits as its factorization.

1040643361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 1040643361 is about 32259.0043398739. The cubic root of 1040643361 is about 1013.3682797442.

The spelling of 1040643361 in words is "one billion, forty million, six hundred forty-three thousand, three hundred sixty-one".