40240019 has 2 divisors, whose sum is σ = 40240020. Its totient is φ = 40240018.

The previous prime is 40240007. The next prime is 40240027. The reversal of 40240019 is 91004204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40240019 - 2⁸ = 40239763 is a prime.

It is a super-2 number, since 2×40240019² = 3238518258240722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40243019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20120009 + 20120010.

It is an arithmetic number, because the mean of its divisors is an integer number (20120010).

Almost surely, 2^40240019 is an apocalyptic number.

40240019 is a deficient number, since it is larger than the sum of its proper divisors (1).

40240019 is an equidigital number, since it uses as much as digits as its factorization.

40240019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 40240019 is about 6343.5021084571. The cubic root of 40240019 is about 342.6778702087.

The spelling of 40240019 in words is "forty million, two hundred forty thousand, nineteen".