1678023 has 16 divisors (see below), whose sum is σ = 2617600. Its totient is φ = 1059480.

The previous prime is 1678021. The next prime is 1678031. The reversal of 1678023 is 3208761.

It is not a de Polignac number, because 1678023 - 2¹ = 1678021 is a prime.

It is a super-2 number, since 2×1678023² = 5631522377058, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1123 + ... + 2148.

It is an arithmetic number, because the mean of its divisors is an integer number (163600).

2^1678023 is an apocalyptic number.

1678023 is a deficient number, since it is larger than the sum of its proper divisors (939577).

1678023 is a wasteful number, since it uses less digits than its factorization.

1678023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299 (or 3293 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1678023 is about 1295.3852708750. The cubic root of 1678023 is about 118.8317892686.

The spelling of 1678023 in words is "one million, six hundred seventy-eight thousand, twenty-three".