1687405141 has 2 divisors, whose sum is σ = 1687405142. Its totient is φ = 1687405140.

The previous prime is 1687405103. The next prime is 1687405207. The reversal of 1687405141 is 1415047861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1085438916 + 601966225 = 32946^2 + 24535^2 .

It is an emirp because it is prime and its reverse (1415047861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1687405141 - 2¹⁵ = 1687372373 is a prime.

It is a super-2 number, since 2×1687405141² = 5694672219746459762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1687405141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1687403141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 843702570 + 843702571.

It is an arithmetic number, because the mean of its divisors is an integer number (843702571).

Almost surely, 2^1687405141 is an apocalyptic number.

It is an amenable number.

1687405141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1687405141 is an equidigital number, since it uses as much as digits as its factorization.

1687405141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 1687405141 is about 41078.0372096818. The cubic root of 1687405141 is about 1190.5284805172.

The spelling of 1687405141 in words is "one billion, six hundred eighty-seven million, four hundred five thousand, one hundred forty-one".