4090645687 has 2 divisors, whose sum is σ = 4090645688. Its totient is φ = 4090645686.

The previous prime is 4090645681. The next prime is 4090645709. The reversal of 4090645687 is 7865460904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4090645687 - 2¹¹ = 4090643639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4090645687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4090645681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2045322843 + 2045322844.

It is an arithmetic number, because the mean of its divisors is an integer number (2045322844).

Almost surely, 2^4090645687 is an apocalyptic number.

4090645687 is a deficient number, since it is larger than the sum of its proper divisors (1).

4090645687 is an equidigital number, since it uses as much as digits as its factorization.

4090645687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 4090645687 is about 63958.1557504592. The cubic root of 4090645687 is about 1599.3025198232.

The spelling of 4090645687 in words is "four billion, ninety million, six hundred forty-five thousand, six hundred eighty-seven".