39934987 has 2 divisors, whose sum is σ = 39934988. Its totient is φ = 39934986.

The previous prime is 39934967. The next prime is 39935009. The reversal of 39934987 is 78943993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39934987 - 2¹⁹ = 39410699 is a prime.

It is a super-3 number, since 3×39934987³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (39934907) 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, 19967493 + 19967494.

It is an arithmetic number, because the mean of its divisors is an integer number (19967494).

Almost surely, 2^39934987 is an apocalyptic number.

39934987 is a deficient number, since it is larger than the sum of its proper divisors (1).

39934987 is an equidigital number, since it uses as much as digits as its factorization.

39934987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 52.

The square root of 39934987 is about 6319.4135012673. The cubic root of 39934987 is about 341.8098044184.

The spelling of 39934987 in words is "thirty-nine million, nine hundred thirty-four thousand, nine hundred eighty-seven".