40381423 has 2 divisors, whose sum is σ = 40381424. Its totient is φ = 40381422.

The previous prime is 40381421. The next prime is 40381447. The reversal of 40381423 is 32418304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40381423 - 2¹ = 40381421 is a prime.

Together with 40381421, it forms a pair of twin primes.

It is equal to p_2455504 and since 40381423 and 2455504 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40381421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20190711 + 20190712.

It is an arithmetic number, because the mean of its divisors is an integer number (20190712).

Almost surely, 2^40381423 is an apocalyptic number.

40381423 is a deficient number, since it is larger than the sum of its proper divisors (1).

40381423 is an equidigital number, since it uses as much as digits as its factorization.

40381423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 40381423 is about 6354.6379125801. The cubic root of 40381423 is about 343.0787925983.

Adding to 40381423 its reverse (32418304), we get a palindrome (72799727).

It can be divided in two parts, 40381 and 423, that added together give a palindrome (40804).

The spelling of 40381423 in words is "forty million, three hundred eighty-one thousand, four hundred twenty-three".