40209853 has 2 divisors, whose sum is σ = 40209854. Its totient is φ = 40209852.

The previous prime is 40209847. The next prime is 40209887. The reversal of 40209853 is 35890204.

40209853 is nontrivially palindromic in base 14.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21874329 + 18335524 = 4677^2 + 4282^2 .

It is a cyclic number.

It is not a de Polignac number, because 40209853 - 2¹³ = 40201661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40209053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20104926 + 20104927.

It is an arithmetic number, because the mean of its divisors is an integer number (20104927).

Almost surely, 2^40209853 is an apocalyptic number.

It is an amenable number.

40209853 is a deficient number, since it is larger than the sum of its proper divisors (1).

40209853 is an equidigital number, since it uses as much as digits as its factorization.

40209853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 40209853 is about 6341.1239540006. The cubic root of 40209853 is about 342.5922191159.

The spelling of 40209853 in words is "forty million, two hundred nine thousand, eight hundred fifty-three".