1043221997 has 2 divisors, whose sum is σ = 1043221998. Its totient is φ = 1043221996.

The previous prime is 1043221979. The next prime is 1043222021. The reversal of 1043221997 is 7991223401.

Together with previous prime (1043221979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 554414116 + 488807881 = 23546^2 + 22109^2 .

It is a cyclic number.

It is not a de Polignac number, because 1043221997 - 2¹⁴ = 1043205613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1043221997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1043221297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521610998 + 521610999.

It is an arithmetic number, because the mean of its divisors is an integer number (521610999).

Almost surely, 2^1043221997 is an apocalyptic number.

It is an amenable number.

1043221997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1043221997 is an equidigital number, since it uses as much as digits as its factorization.

1043221997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 1043221997 is about 32298.9473048271. The cubic root of 1043221997 is about 1014.2046061393.

The spelling of 1043221997 in words is "one billion, forty-three million, two hundred twenty-one thousand, nine hundred ninety-seven".