1043421109 has 2 divisors, whose sum is σ = 1043421110. Its totient is φ = 1043421108.

The previous prime is 1043421107. The next prime is 1043421167. The reversal of 1043421109 is 9011243401.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1043096209 + 324900 = 32297^2 + 570^2 .

It is a cyclic number.

It is not a de Polignac number, because 1043421109 - 2¹ = 1043421107 is a prime.

It is a super-2 number, since 2×1043421109² = 2177455221413579762, which contains 22 as substring.

Together with 1043421107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1043421107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521710554 + 521710555.

It is an arithmetic number, because the mean of its divisors is an integer number (521710555).

Almost surely, 2^1043421109 is an apocalyptic number.

It is an amenable number.

1043421109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1043421109 is an equidigital number, since it uses as much as digits as its factorization.

1043421109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1043421109 is about 32302.0294873248. The cubic root of 1043421109 is about 1014.2691265904.

The spelling of 1043421109 in words is "one billion, forty-three million, four hundred twenty-one thousand, one hundred nine".