40908289 has 2 divisors, whose sum is σ = 40908290. Its totient is φ = 40908288.

The previous prime is 40908281. The next prime is 40908319. The reversal of 40908289 is 98280904.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40857664 + 50625 = 6392^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 40908289 - 2³ = 40908281 is a prime.

It is not a weakly prime, because it can be changed into another prime (40908281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20454144 + 20454145.

It is an arithmetic number, because the mean of its divisors is an integer number (20454145).

Almost surely, 2^40908289 is an apocalyptic number.

It is an amenable number.

40908289 is a deficient number, since it is larger than the sum of its proper divisors (1).

40908289 is an equidigital number, since it uses as much as digits as its factorization.

40908289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 40908289 is about 6395.9588022438. The cubic root of 40908289 is about 344.5644268524.

The spelling of 40908289 in words is "forty million, nine hundred eight thousand, two hundred eighty-nine".