675691 has 4 divisors (see below), whose sum is σ = 682000. Its totient is φ = 669384.

The previous prime is 675643. The next prime is 675713. The reversal of 675691 is 196576.

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 675691 - 2⁹ = 675179 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (675601) 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, 2991 + ... + 3208.

It is an arithmetic number, because the mean of its divisors is an integer number (170500).

2⁶⁷⁵⁶⁹¹ is an apocalyptic number.

675691 is a deficient number, since it is larger than the sum of its proper divisors (6309).

675691 is a wasteful number, since it uses less digits than its factorization.

675691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6308.

The product of its digits is 11340, while the sum is 34.

The square root of 675691 is about 822.0042578965. The cubic root of 675691 is about 87.7504552158.

The spelling of 675691 in words is "six hundred seventy-five thousand, six hundred ninety-one".