40004023 has 2 divisors, whose sum is σ = 40004024. Its totient is φ = 40004022.

The previous prime is 40004017. The next prime is 40004039. The reversal of 40004023 is 32040004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40004023 - 2⁵ = 40003991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40003994 and 40004012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40004053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20002011 + 20002012.

It is an arithmetic number, because the mean of its divisors is an integer number (20002012).

Almost surely, 2^40004023 is an apocalyptic number.

40004023 is a deficient number, since it is larger than the sum of its proper divisors (1).

40004023 is an equidigital number, since it uses as much as digits as its factorization.

40004023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 40004023 is about 6324.8733584160. The cubic root of 40004023 is about 342.0066543397.

Adding to 40004023 its reverse (32040004), we get a palindrome (72044027).

The spelling of 40004023 in words is "forty million, four thousand, twenty-three".