40569379 has 2 divisors, whose sum is σ = 40569380. Its totient is φ = 40569378.

The previous prime is 40569317. The next prime is 40569391. The reversal of 40569379 is 97396504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40569379 - 2⁷ = 40569251 is a prime.

It is not a weakly prime, because it can be changed into another prime (40569479) 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, 20284689 + 20284690.

It is an arithmetic number, because the mean of its divisors is an integer number (20284690).

Almost surely, 2^40569379 is an apocalyptic number.

40569379 is a deficient number, since it is larger than the sum of its proper divisors (1).

40569379 is an equidigital number, since it uses as much as digits as its factorization.

40569379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 40569379 is about 6369.4096272732. The cubic root of 40569379 is about 343.6102575131.

The spelling of 40569379 in words is "forty million, five hundred sixty-nine thousand, three hundred seventy-nine".