40969009 has 2 divisors, whose sum is σ = 40969010. Its totient is φ = 40969008.

The previous prime is 40968989. The next prime is 40969037. The reversal of 40969009 is 90096904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40360609 + 608400 = 6353^2 + 780^2 .

It is a cyclic number.

It is not a de Polignac number, because 40969009 - 2¹³ = 40960817 is a prime.

It is not a weakly prime, because it can be changed into another prime (40969039) 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, 20484504 + 20484505.

It is an arithmetic number, because the mean of its divisors is an integer number (20484505).

Almost surely, 2^40969009 is an apocalyptic number.

It is an amenable number.

40969009 is a deficient number, since it is larger than the sum of its proper divisors (1).

40969009 is an equidigital number, since it uses as much as digits as its factorization.

40969009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 40969009 is about 6400.7037894282. The cubic root of 40969009 is about 344.7348210813.

The spelling of 40969009 in words is "forty million, nine hundred sixty-nine thousand, nine".