40005023 has 2 divisors, whose sum is σ = 40005024. Its totient is φ = 40005022.

The previous prime is 40005011. The next prime is 40005041. The reversal of 40005023 is 32050004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40005023 - 2¹² = 40000927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40004989 and 40005007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40005923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20002511 + 20002512.

It is an arithmetic number, because the mean of its divisors is an integer number (20002512).

Almost surely, 2^40005023 is an apocalyptic number.

40005023 is a deficient number, since it is larger than the sum of its proper divisors (1).

40005023 is an equidigital number, since it uses as much as digits as its factorization.

40005023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 40005023 is about 6324.9524108882. The cubic root of 40005023 is about 342.0095040848.

Adding to 40005023 its reverse (32050004), we get a palindrome (72055027).

The spelling of 40005023 in words is "forty million, five thousand, twenty-three".