40629287 has 2 divisors, whose sum is σ = 40629288. Its totient is φ = 40629286.

The previous prime is 40629209. The next prime is 40629289. The reversal of 40629287 is 78292604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40629287 - 2¹⁸ = 40367143 is a prime.

Together with 40629289, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40629287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40629289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20314643 + 20314644.

It is an arithmetic number, because the mean of its divisors is an integer number (20314644).

Almost surely, 2^40629287 is an apocalyptic number.

40629287 is a deficient number, since it is larger than the sum of its proper divisors (1).

40629287 is an equidigital number, since it uses as much as digits as its factorization.

40629287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 40629287 is about 6374.1106830679. The cubic root of 40629287 is about 343.7793084873.

The spelling of 40629287 in words is "forty million, six hundred twenty-nine thousand, two hundred eighty-seven".