623667 has 8 divisors (see below), whose sum is σ = 907200. Its totient is φ = 377960.

The previous prime is 623653. The next prime is 623669. The reversal of 623667 is 766326.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 623667 - 2¹¹ = 621619 is a prime.

623667 is a lucky number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (623669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9417 + ... + 9482.

It is an arithmetic number, because the mean of its divisors is an integer number (113400).

2⁶²³⁶⁶⁷ is an apocalyptic number.

623667 is a deficient number, since it is larger than the sum of its proper divisors (283533).

623667 is a wasteful number, since it uses less digits than its factorization.

623667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18913.

The product of its digits is 9072, while the sum is 30.

The square root of 623667 is about 789.7259018166. The cubic root of 623667 is about 85.4379701242.

The spelling of 623667 in words is "six hundred twenty-three thousand, six hundred sixty-seven".