1040423201689 has 2 divisors, whose sum is σ = 1040423201690. Its totient is φ = 1040423201688.

The previous prime is 1040423201569. The next prime is 1040423201707. The reversal of 1040423201689 is 9861023240401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 708080175625 + 332343026064 = 841475^2 + 576492^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1040423201689 is a prime.

It is a super-2 number, since 2×1040423201689² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1040423201789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520211600844 + 520211600845.

It is an arithmetic number, because the mean of its divisors is an integer number (520211600845).

Almost surely, 2^{1040423201689} is an apocalyptic number.

It is an amenable number.

1040423201689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040423201689 is an equidigital number, since it uses as much as digits as its factorization.

1040423201689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 1040423201689 in words is "one trillion, forty billion, four hundred twenty-three million, two hundred one thousand, six hundred eighty-nine".