675631643 has 4 divisors (see below), whose sum is σ = 675711960. Its totient is φ = 675551328.

The previous prime is 675631631. The next prime is 675631657. The reversal of 675631643 is 346136576.

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 675631643 - 2⁸ = 675631387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 675631643.

It is not an unprimeable number, because it can be changed into a prime (675631603) 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, 25838 + ... + 44931.

It is an arithmetic number, because the mean of its divisors is an integer number (168927990).

Almost surely, 2^675631643 is an apocalyptic number.

675631643 is a deficient number, since it is larger than the sum of its proper divisors (80317).

675631643 is an equidigital number, since it uses as much as digits as its factorization.

675631643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80316.

The product of its digits is 272160, while the sum is 41.

The square root of 675631643 is about 25992.9152462743. The cubic root of 675631643 is about 877.4788562098.

The spelling of 675631643 in words is "six hundred seventy-five million, six hundred thirty-one thousand, six hundred forty-three".