40627649 has 2 divisors, whose sum is σ = 40627650. Its totient is φ = 40627648.

The previous prime is 40627633. The next prime is 40627667. The reversal of 40627649 is 94672604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25573249 + 15054400 = 5057^2 + 3880^2 .

It is a cyclic number.

It is not a de Polignac number, because 40627649 - 2⁴ = 40627633 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40627619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20313824 + 20313825.

It is an arithmetic number, because the mean of its divisors is an integer number (20313825).

Almost surely, 2^40627649 is an apocalyptic number.

It is an amenable number.

40627649 is a deficient number, since it is larger than the sum of its proper divisors (1).

40627649 is an equidigital number, since it uses as much as digits as its factorization.

40627649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 40627649 is about 6373.9821932603. The cubic root of 40627649 is about 343.7746885188.

It can be divided in two parts, 4062 and 7649, that added together give a palindrome (11711).

The spelling of 40627649 in words is "forty million, six hundred twenty-seven thousand, six hundred forty-nine".