623987 has 8 divisors (see below), whose sum is σ = 768096. Its totient is φ = 493632.

The previous prime is 623983. The next prime is 623989. The reversal of 623987 is 789326.

623987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 623987 - 2² = 623983 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 623987.

It is not an unprimeable number, because it can be changed into a prime (623983) 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, 3338 + ... + 3519.

It is an arithmetic number, because the mean of its divisors is an integer number (96012).

2⁶²³⁹⁸⁷ is an apocalyptic number.

623987 is a deficient number, since it is larger than the sum of its proper divisors (144109).

623987 is a wasteful number, since it uses less digits than its factorization.

623987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6877.

The product of its digits is 18144, while the sum is 35.

The square root of 623987 is about 789.9284777750. The cubic root of 623987 is about 85.4525802050.

The spelling of 623987 in words is "six hundred twenty-three thousand, nine hundred eighty-seven".