40406489 has 2 divisors, whose sum is σ = 40406490. Its totient is φ = 40406488.

The previous prime is 40406459. The next prime is 40406491. The reversal of 40406489 is 98460404.

40406489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25928464 + 14478025 = 5092^2 + 3805^2 .

It is a cyclic number.

It is not a de Polignac number, because 40406489 - 2¹⁶ = 40340953 is a prime.

Together with 40406491, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_2456927 and since 40406489 and 2456927 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40406459) 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, 20203244 + 20203245.

It is an arithmetic number, because the mean of its divisors is an integer number (20203245).

Almost surely, 2^40406489 is an apocalyptic number.

It is an amenable number.

40406489 is a deficient number, since it is larger than the sum of its proper divisors (1).

40406489 is an equidigital number, since it uses as much as digits as its factorization.

40406489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 40406489 is about 6356.6098669023. The cubic root of 40406489 is about 343.1497644598.

The spelling of 40406489 in words is "forty million, four hundred six thousand, four hundred eighty-nine".