1046861643 has 4 divisors (see below), whose sum is σ = 1395815528. Its totient is φ = 697907760.

The previous prime is 1046861623. The next prime is 1046861659. The reversal of 1046861643 is 3461686401.

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

It is not a de Polignac number, because 1046861643 - 2⁵ = 1046861611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1046861623) 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 in 3 ways as a sum of consecutive naturals, for example, 174476938 + ... + 174476943.

It is an arithmetic number, because the mean of its divisors is an integer number (348953882).

Almost surely, 2^1046861643 is an apocalyptic number.

1046861643 is a deficient number, since it is larger than the sum of its proper divisors (348953885).

1046861643 is an equidigital number, since it uses as much as digits as its factorization.

1046861643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348953884.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 1046861643 is about 32355.2413528318. The cubic root of 1046861643 is about 1015.3827066773.

The spelling of 1046861643 in words is "one billion, forty-six million, eight hundred sixty-one thousand, six hundred forty-three".