675491643 has 24 divisors (see below), whose sum is σ = 1044499456. Its totient is φ = 435796200.

The previous prime is 675491627. The next prime is 675491653. The reversal of 675491643 is 346194576.

675491643 is a `hidden beast` number, since 67 + 549 + 1 + 6 + 43 = 666.

675491643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 675491643 - 2⁴ = 675491627 is a prime.

It is a super-4 number, since 4×675491643⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (675491603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37303 + ... + 52368.

Almost surely, 2^675491643 is an apocalyptic number.

675491643 is a deficient number, since it is larger than the sum of its proper divisors (369007813).

675491643 is an equidigital number, since it uses as much as digits as its factorization.

675491643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89717 (or 89705 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 675491643 is about 25990.2220652306. Note that the first 3 decimals coincide. The cubic root of 675491643 is about 877.4182435336.

The spelling of 675491643 in words is "six hundred seventy-five million, four hundred ninety-one thousand, six hundred forty-three".