655967 has 4 divisors (see below), whose sum is σ = 706440. Its totient is φ = 605496.

The previous prime is 655961. The next prime is 655987. The reversal of 655967 is 769556.

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 655967 - 2¹⁰ = 654943 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 655967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655961) 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, 25217 + ... + 25242.

It is an arithmetic number, because the mean of its divisors is an integer number (176610).

2⁶⁵⁵⁹⁶⁷ is an apocalyptic number.

655967 is a deficient number, since it is larger than the sum of its proper divisors (50473).

655967 is a wasteful number, since it uses less digits than its factorization.

655967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50472.

The product of its digits is 56700, while the sum is 38.

The square root of 655967 is about 809.9178970735. The cubic root of 655967 is about 86.8881727002. Note that the first 3 decimals are identical.

It can be divided in two parts, 6559 and 67, that multiplied together give a triangular number (439453 = T₉₃₇).

The spelling of 655967 in words is "six hundred fifty-five thousand, nine hundred sixty-seven".