1043646641 has 4 divisors (see below), whose sum is σ = 1046799984. Its totient is φ = 1040493300.

The previous prime is 1043646631. The next prime is 1043646673. The reversal of 1043646641 is 1466463401.

It is a happy number.

1043646641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1043646641 is a prime.

It is a super-2 number, since 2×1043646641² = 2178396622541165762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1043646601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1576175 + ... + 1576836.

It is an arithmetic number, because the mean of its divisors is an integer number (261699996).

Almost surely, 2^1043646641 is an apocalyptic number.

It is an amenable number.

1043646641 is a deficient number, since it is larger than the sum of its proper divisors (3153343).

1043646641 is an equidigital number, since it uses as much as digits as its factorization.

1043646641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3153342.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 1043646641 is about 32305.5202867869. The cubic root of 1043646641 is about 1014.3421982912.

The spelling of 1043646641 in words is "one billion, forty-three million, six hundred forty-six thousand, six hundred forty-one".