687023 has 2 divisors, whose sum is σ = 687024. Its totient is φ = 687022.

The previous prime is 687019. The next prime is 687031. The reversal of 687023 is 320786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 687023 - 2² = 687019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 686983 and 687001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343511 + 343512.

It is an arithmetic number, because the mean of its divisors is an integer number (343512).

2⁶⁸⁷⁰²³ is an apocalyptic number.

687023 is a deficient number, since it is larger than the sum of its proper divisors (1).

687023 is an equidigital number, since it uses as much as digits as its factorization.

687023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 687023 is about 828.8685058560. The cubic root of 687023 is about 88.2382918284.

The spelling of 687023 in words is "six hundred eighty-seven thousand, twenty-three".