40209293 has 2 divisors, whose sum is σ = 40209294. Its totient is φ = 40209292.

The previous prime is 40209251. The next prime is 40209371. The reversal of 40209293 is 39290204.

40209293 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30052324 + 10156969 = 5482^2 + 3187^2 .

It is a cyclic number.

It is not a de Polignac number, because 40209293 - 2⁶ = 40209229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40209223) 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, 20104646 + 20104647.

It is an arithmetic number, because the mean of its divisors is an integer number (20104647).

Almost surely, 2^40209293 is an apocalyptic number.

It is an amenable number.

40209293 is a deficient number, since it is larger than the sum of its proper divisors (1).

40209293 is an equidigital number, since it uses as much as digits as its factorization.

40209293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 40209293 is about 6341.0797976370. The cubic root of 40209293 is about 342.5906286886.

Adding to 40209293 its reverse (39290204), we get a palindrome (79499497).

The spelling of 40209293 in words is "forty million, two hundred nine thousand, two hundred ninety-three".