40442629 has 2 divisors, whose sum is σ = 40442630. Its totient is φ = 40442628.

The previous prime is 40442627. The next prime is 40442639. The reversal of 40442629 is 92624404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22184100 + 18258529 = 4710^2 + 4273^2 .

It is a cyclic number.

It is not a de Polignac number, because 40442629 - 2¹ = 40442627 is a prime.

Together with 40442627, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 40442629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40442627) 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, 20221314 + 20221315.

It is an arithmetic number, because the mean of its divisors is an integer number (20221315).

Almost surely, 2^40442629 is an apocalyptic number.

It is an amenable number.

40442629 is a deficient number, since it is larger than the sum of its proper divisors (1).

40442629 is an equidigital number, since it uses as much as digits as its factorization.

40442629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 40442629 is about 6359.4519417950. The cubic root of 40442629 is about 343.2520395919.

The spelling of 40442629 in words is "forty million, four hundred forty-two thousand, six hundred twenty-nine".