2029681 has 16 divisors (see below), whose sum is σ = 2332800. Its totient is φ = 1754368.

The previous prime is 2029679. The next prime is 2029697. The reversal of 2029681 is 1869202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2029681 - 2¹ = 2029679 is a prime.

It is a super-2 number, since 2×2029681² = 8239209923522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2029661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11250 + ... + 11428.

It is an arithmetic number, because the mean of its divisors is an integer number (145800).

2^2029681 is an apocalyptic number.

It is an amenable number.

2029681 is a deficient number, since it is larger than the sum of its proper divisors (303119).

2029681 is a wasteful number, since it uses less digits than its factorization.

2029681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 2029681 is about 1424.6687334254. The cubic root of 2029681 is about 126.6123089323.

The spelling of 2029681 in words is "two million, twenty-nine thousand, six hundred eighty-one".