40579393 has 2 divisors, whose sum is σ = 40579394. Its totient is φ = 40579392.

The previous prime is 40579387. The next prime is 40579423. The reversal of 40579393 is 39397504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40233649 + 345744 = 6343^2 + 588^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40579393 is a prime.

It is not a weakly prime, because it can be changed into another prime (40579303) 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, 20289696 + 20289697.

It is an arithmetic number, because the mean of its divisors is an integer number (20289697).

Almost surely, 2^40579393 is an apocalyptic number.

It is an amenable number.

40579393 is a deficient number, since it is larger than the sum of its proper divisors (1).

40579393 is an equidigital number, since it uses as much as digits as its factorization.

40579393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 40.

The square root of 40579393 is about 6370.1956798830. The cubic root of 40579393 is about 343.6385270284.

The spelling of 40579393 in words is "forty million, five hundred seventy-nine thousand, three hundred ninety-three".