40691219 has 2 divisors, whose sum is σ = 40691220. Its totient is φ = 40691218.

The previous prime is 40691207. The next prime is 40691221. The reversal of 40691219 is 91219604.

40691219 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40691219 - 2⁸ = 40690963 is a prime.

It is a super-2 number, since 2×40691219² = 3311550607411922, which contains 22 as substring.

Together with 40691221, 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 (40691249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20345609 + 20345610.

It is an arithmetic number, because the mean of its divisors is an integer number (20345610).

Almost surely, 2^40691219 is an apocalyptic number.

40691219 is a deficient number, since it is larger than the sum of its proper divisors (1).

40691219 is an equidigital number, since it uses as much as digits as its factorization.

40691219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 40691219 is about 6378.9669226294. The cubic root of 40691219 is about 343.9538962686.

The spelling of 40691219 in words is "forty million, six hundred ninety-one thousand, two hundred nineteen".