1043401643 has 4 divisors (see below), whose sum is σ = 1079381040. Its totient is φ = 1007422248.

The previous prime is 1043401637. The next prime is 1043401651. The reversal of 1043401643 is 3461043401.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1043401643 - 2²² = 1039207339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1043401633) 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, 17989655 + ... + 17989712.

It is an arithmetic number, because the mean of its divisors is an integer number (269845260).

Almost surely, 2^1043401643 is an apocalyptic number.

1043401643 is a deficient number, since it is larger than the sum of its proper divisors (35979397).

1043401643 is an equidigital number, since it uses as much as digits as its factorization.

1043401643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35979396.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 1043401643 is about 32301.7281735823. The cubic root of 1043401643 is about 1014.2628191703.

The spelling of 1043401643 in words is "one billion, forty-three million, four hundred one thousand, six hundred forty-three".