40089817 has 2 divisors, whose sum is σ = 40089818. Its totient is φ = 40089816.

The previous prime is 40089811. The next prime is 40089821. The reversal of 40089817 is 71898004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32046921 + 8042896 = 5661^2 + 2836^2 .

It is a cyclic number.

It is not a de Polignac number, because 40089817 - 2¹⁹ = 39565529 is a prime.

It is not a weakly prime, because it can be changed into another prime (40089811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20044908 + 20044909.

It is an arithmetic number, because the mean of its divisors is an integer number (20044909).

Almost surely, 2^40089817 is an apocalyptic number.

It is an amenable number.

40089817 is a deficient number, since it is larger than the sum of its proper divisors (1).

40089817 is an equidigital number, since it uses as much as digits as its factorization.

40089817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 40089817 is about 6331.6519961223. The cubic root of 40089817 is about 342.2509728325.

The spelling of 40089817 in words is "forty million, eighty-nine thousand, eight hundred seventeen".