4000923 has 6 divisors (see below), whose sum is σ = 5779124. Its totient is φ = 2667276.

The previous prime is 4000907. The next prime is 4000937. The reversal of 4000923 is 3290004.

It is not a de Polignac number, because 4000923 - 2⁴ = 4000907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4000896 and 4000905.

It is not an unprimeable number, because it can be changed into a prime (4000993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222265 + ... + 222282.

Almost surely, 2^4000923 is an apocalyptic number.

4000923 is a deficient number, since it is larger than the sum of its proper divisors (1778201).

4000923 is a wasteful number, since it uses less digits than its factorization.

4000923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444553 (or 444550 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 4000923 is about 2000.2307366901. The cubic root of 4000923 is about 158.7523140176.

Adding to 4000923 its reverse (3290004), we get a palindrome (7290927).

The spelling of 4000923 in words is "four million, nine hundred twenty-three", and thus it is an aban number.