1799681 has 12 divisors (see below), whose sum is σ = 2037888. Its totient is φ = 1585584.

The previous prime is 1799639. The next prime is 1799701. The reversal of 1799681 is 1869971.

It is a happy number.

It is not a de Polignac number, because 1799681 - 2⁶ = 1799617 is a prime.

It is a super-2 number, since 2×1799681² = 6477703403522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1799621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3656 + ... + 4118.

It is an arithmetic number, because the mean of its divisors is an integer number (169824).

2^1799681 is an apocalyptic number.

It is an amenable number.

1799681 is a deficient number, since it is larger than the sum of its proper divisors (238207).

1799681 is a wasteful number, since it uses less digits than its factorization.

1799681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 499 counting only the distinct ones).

The product of its digits is 27216, while the sum is 41.

The square root of 1799681 is about 1341.5218969514. The cubic root of 1799681 is about 121.6368534779.

The spelling of 1799681 in words is "one million, seven hundred ninety-nine thousand, six hundred eighty-one".