40646629 has 2 divisors, whose sum is σ = 40646630. Its totient is φ = 40646628.

The previous prime is 40646597. The next prime is 40646647. The reversal of 40646629 is 92664604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29953729 + 10692900 = 5473^2 + 3270^2 .

It is a cyclic number.

It is not a de Polignac number, because 40646629 - 2⁵ = 40646597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40646329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20323314 + 20323315.

It is an arithmetic number, because the mean of its divisors is an integer number (20323315).

Almost surely, 2^40646629 is an apocalyptic number.

It is an amenable number.

40646629 is a deficient number, since it is larger than the sum of its proper divisors (1).

40646629 is an equidigital number, since it uses as much as digits as its factorization.

40646629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 40646629 is about 6375.4708845700. The cubic root of 40646629 is about 343.8282138720.

The spelling of 40646629 in words is "forty million, six hundred forty-six thousand, six hundred twenty-nine".