40680449 has 2 divisors, whose sum is σ = 40680450. Its totient is φ = 40680448.

The previous prime is 40680421. The next prime is 40680461. The reversal of 40680449 is 94408604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28729600 + 11950849 = 5360^2 + 3457^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40680449 is a prime.

It is not a weakly prime, because it can be changed into another prime (40680469) 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, 20340224 + 20340225.

It is an arithmetic number, because the mean of its divisors is an integer number (20340225).

Almost surely, 2^40680449 is an apocalyptic number.

It is an amenable number.

40680449 is a deficient number, since it is larger than the sum of its proper divisors (1).

40680449 is an equidigital number, since it uses as much as digits as its factorization.

40680449 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 40680449 is about 6378.1226861828. The cubic root of 40680449 is about 343.9235481131.

The spelling of 40680449 in words is "forty million, six hundred eighty thousand, four hundred forty-nine".