675679891 has 4 divisors (see below), whose sum is σ = 678483784. Its totient is φ = 672876000.

The previous prime is 675679889. The next prime is 675679931. The reversal of 675679891 is 198976576.

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 675679891 - 2¹ = 675679889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (675679831) 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, 1401585 + ... + 1402066.

It is an arithmetic number, because the mean of its divisors is an integer number (169620946).

Almost surely, 2^675679891 is an apocalyptic number.

675679891 is a deficient number, since it is larger than the sum of its proper divisors (2803893).

675679891 is a wasteful number, since it uses less digits than its factorization.

675679891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803892.

The product of its digits is 5715360, while the sum is 58.

The square root of 675679891 is about 25993.8433287577. The cubic root of 675679891 is about 877.4997431297.

The spelling of 675679891 in words is "six hundred seventy-five million, six hundred seventy-nine thousand, eight hundred ninety-one".