40421323 has 2 divisors, whose sum is σ = 40421324. Its totient is φ = 40421322.

The previous prime is 40421317. The next prime is 40421347. The reversal of 40421323 is 32312404.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40421323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40421323.

It is not a weakly prime, because it can be changed into another prime (40421383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20210661 + 20210662.

It is an arithmetic number, because the mean of its divisors is an integer number (20210662).

Almost surely, 2^40421323 is an apocalyptic number.

40421323 is a deficient number, since it is larger than the sum of its proper divisors (1).

40421323 is an equidigital number, since it uses as much as digits as its factorization.

40421323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 40421323 is about 6357.7765767601. The cubic root of 40421323 is about 343.1917516170.

Adding to 40421323 its reverse (32312404), we get a palindrome (72733727).

The spelling of 40421323 in words is "forty million, four hundred twenty-one thousand, three hundred twenty-three".