40069889 has 2 divisors, whose sum is σ = 40069890. Its totient is φ = 40069888.

The previous prime is 40069871. The next prime is 40069921. The reversal of 40069889 is 98896004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25170289 + 14899600 = 5017^2 + 3860^2 .

It is a cyclic number.

It is not a de Polignac number, because 40069889 - 2²⁴ = 23292673 is a prime.

It is not a weakly prime, because it can be changed into another prime (40069829) 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, 20034944 + 20034945.

It is an arithmetic number, because the mean of its divisors is an integer number (20034945).

Almost surely, 2^40069889 is an apocalyptic number.

It is an amenable number.

40069889 is a deficient number, since it is larger than the sum of its proper divisors (1).

40069889 is an equidigital number, since it uses as much as digits as its factorization.

40069889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 40069889 is about 6330.0781195811. The cubic root of 40069889 is about 342.1942542915.

The spelling of 40069889 in words is "forty million, sixty-nine thousand, eight hundred eighty-nine".