1681313087 has 8 divisors (see below), whose sum is σ = 1754833920. Its totient is φ = 1607827320.

The previous prime is 1681313063. The next prime is 1681313099. The reversal of 1681313087 is 7803131861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1681313087 - 2¹² = 1681308991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1681313087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681313057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152714 + ... + 163352.

It is an arithmetic number, because the mean of its divisors is an integer number (219354240).

Almost surely, 2^1681313087 is an apocalyptic number.

1681313087 is a deficient number, since it is larger than the sum of its proper divisors (73520833).

1681313087 is a wasteful number, since it uses less digits than its factorization.

1681313087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17533.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1681313087 is about 41003.8179563806. The cubic root of 1681313087 is about 1189.0940276199.

The spelling of 1681313087 in words is "one billion, six hundred eighty-one million, three hundred thirteen thousand, eighty-seven".