4000505687 has 2 divisors, whose sum is σ = 4000505688. Its totient is φ = 4000505686.

The previous prime is 4000505657. The next prime is 4000505819. The reversal of 4000505687 is 7865050004.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4000505687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4000505617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000252843 + 2000252844.

It is an arithmetic number, because the mean of its divisors is an integer number (2000252844).

Almost surely, 2^4000505687 is an apocalyptic number.

4000505687 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000505687 is an equidigital number, since it uses as much as digits as its factorization.

4000505687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 4000505687 is about 63249.5508837810. The cubic root of 4000505687 is about 1587.4679431558.

The spelling of 4000505687 in words is "four billion, five hundred five thousand, six hundred eighty-seven".