40219747 has 2 divisors, whose sum is σ = 40219748. Its totient is φ = 40219746.

The previous prime is 40219721. The next prime is 40219759. The reversal of 40219747 is 74791204.

40219747 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 a de Polignac number, because none of the positive numbers 2^k-40219747 is a prime.

It is not a weakly prime, because it can be changed into another prime (40219787) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20109873 + 20109874.

It is an arithmetic number, because the mean of its divisors is an integer number (20109874).

Almost surely, 2^40219747 is an apocalyptic number.

40219747 is the 3662-nd hex number.

40219747 is a deficient number, since it is larger than the sum of its proper divisors (1).

40219747 is an equidigital number, since it uses as much as digits as its factorization.

40219747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 40219747 is about 6341.9040516236. The cubic root of 40219747 is about 342.6203161218.

The spelling of 40219747 in words is "forty million, two hundred nineteen thousand, seven hundred forty-seven".