2069981 has 4 divisors (see below), whose sum is σ = 2073312. Its totient is φ = 2066652.

The previous prime is 2069959. The next prime is 2069983. The reversal of 2069981 is 1899602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2069981 - 2¹⁸ = 1807837 is a prime.

It is a super-2 number, since 2×2069981² = 8569642680722, 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 (2069983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425 + ... + 2078.

It is an arithmetic number, because the mean of its divisors is an integer number (518328).

2^2069981 is an apocalyptic number.

It is an amenable number.

2069981 is a deficient number, since it is larger than the sum of its proper divisors (3331).

2069981 is an equidigital number, since it uses as much as digits as its factorization.

2069981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3330.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 2069981 is about 1438.7428540222. The cubic root of 2069981 is about 127.4447998907. Note that the first 3 decimals are identical.

The spelling of 2069981 in words is "two million, sixty-nine thousand, nine hundred eighty-one".