40040293 has 2 divisors, whose sum is σ = 40040294. Its totient is φ = 40040292.

The previous prime is 40040269. The next prime is 40040393. The reversal of 40040293 is 39204004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35784324 + 4255969 = 5982^2 + 2063^2 .

It is a cyclic number.

It is not a de Polignac number, because 40040293 - 2¹³ = 40032101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40040093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20020146 + 20020147.

It is an arithmetic number, because the mean of its divisors is an integer number (20020147).

Almost surely, 2^40040293 is an apocalyptic number.

It is an amenable number.

40040293 is a deficient number, since it is larger than the sum of its proper divisors (1).

40040293 is an equidigital number, since it uses as much as digits as its factorization.

40040293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 40040293 is about 6327.7399598909. The cubic root of 40040293 is about 342.1099842334.

Adding to 40040293 its reverse (39204004), we get a palindrome (79244297).

The spelling of 40040293 in words is "forty million, forty thousand, two hundred ninety-three".