40782919 has 2 divisors, whose sum is σ = 40782920. Its totient is φ = 40782918.

The previous prime is 40782913. The next prime is 40782923. The reversal of 40782919 is 91928704.

40782919 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-40782919 is a prime.

It is a super-2 number, since 2×40782919² = 3326492964321122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40782913) 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, 20391459 + 20391460.

It is an arithmetic number, because the mean of its divisors is an integer number (20391460).

Almost surely, 2^40782919 is an apocalyptic number.

40782919 is a deficient number, since it is larger than the sum of its proper divisors (1).

40782919 is an equidigital number, since it uses as much as digits as its factorization.

40782919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 40782919 is about 6386.1505619583. The cubic root of 40782919 is about 344.2120757141.

The spelling of 40782919 in words is "forty million, seven hundred eighty-two thousand, nine hundred nineteen".