40008427 has 2 divisors, whose sum is σ = 40008428. Its totient is φ = 40008426.

The previous prime is 40008413. The next prime is 40008439. The reversal of 40008427 is 72480004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40008427 - 2⁷ = 40008299 is a prime.

It is not a weakly prime, because it can be changed into another prime (40008457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20004213 + 20004214.

It is an arithmetic number, because the mean of its divisors is an integer number (20004214).

Almost surely, 2^40008427 is an apocalyptic number.

40008427 is a deficient number, since it is larger than the sum of its proper divisors (1).

40008427 is an equidigital number, since it uses as much as digits as its factorization.

40008427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 40008427 is about 6325.2214980979. The cubic root of 40008427 is about 342.0192042611.

The spelling of 40008427 in words is "forty million, eight thousand, four hundred twenty-seven".