40018259 has 2 divisors, whose sum is σ = 40018260. Its totient is φ = 40018258.

The previous prime is 40018249. The next prime is 40018261. The reversal of 40018259 is 95281004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40018259 - 2⁴ = 40018243 is a prime.

It is a super-2 number, since 2×40018259² = 3202922106782162, which contains 22 as substring.

Together with 40018261, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40018219) 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, 20009129 + 20009130.

It is an arithmetic number, because the mean of its divisors is an integer number (20009130).

Almost surely, 2^40018259 is an apocalyptic number.

40018259 is a deficient number, since it is larger than the sum of its proper divisors (1).

40018259 is an equidigital number, since it uses as much as digits as its factorization.

40018259 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 40018259 is about 6325.9986563388. The cubic root of 40018259 is about 342.0472188374.

The spelling of 40018259 in words is "forty million, eighteen thousand, two hundred fifty-nine".