40858687 has 2 divisors, whose sum is σ = 40858688. Its totient is φ = 40858686.

The previous prime is 40858639. The next prime is 40858711. The reversal of 40858687 is 78685804.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40858687 - 2¹¹ = 40856639 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40858627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20429343 + 20429344.

It is an arithmetic number, because the mean of its divisors is an integer number (20429344).

Almost surely, 2^40858687 is an apocalyptic number.

40858687 is a deficient number, since it is larger than the sum of its proper divisors (1).

40858687 is an equidigital number, since it uses as much as digits as its factorization.

40858687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 430080, while the sum is 46.

The square root of 40858687 is about 6392.0800214015. The cubic root of 40858687 is about 344.4251071080.

It can be divided in two parts, 408 and 58687, that added together give a palindrome (59095).

The spelling of 40858687 in words is "forty million, eight hundred fifty-eight thousand, six hundred eighty-seven".