40469987 has 2 divisors, whose sum is σ = 40469988. Its totient is φ = 40469986.

The previous prime is 40469969. The next prime is 40470029. The reversal of 40469987 is 78996404.

40469987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40469987 - 2⁸ = 40469731 is a prime.

It is not a weakly prime, because it can be changed into another prime (40469927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20234993 + 20234994.

It is an arithmetic number, because the mean of its divisors is an integer number (20234994).

Almost surely, 2^40469987 is an apocalyptic number.

40469987 is a deficient number, since it is larger than the sum of its proper divisors (1).

40469987 is an equidigital number, since it uses as much as digits as its factorization.

40469987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 40469987 is about 6361.6025496725. The cubic root of 40469987 is about 343.3294214110.

The spelling of 40469987 in words is "forty million, four hundred sixty-nine thousand, nine hundred eighty-seven".