2921989 has 8 divisors (see below), whose sum is σ = 3484800. Its totient is φ = 2395536.

The previous prime is 2921987. The next prime is 2922041. The reversal of 2921989 is 9891292.

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 2921989 - 2¹ = 2921987 is a prime.

It is a super-2 number, since 2×2921989² = 17076039432242, 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 (2921981) 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, 8914 + ... + 9235.

It is an arithmetic number, because the mean of its divisors is an integer number (435600).

2^2921989 is an apocalyptic number.

It is an amenable number.

2921989 is a deficient number, since it is larger than the sum of its proper divisors (562811).

2921989 is a wasteful number, since it uses less digits than its factorization.

2921989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18179.

The product of its digits is 23328, while the sum is 40.

The square root of 2921989 is about 1709.3826370945. The cubic root of 2921989 is about 142.9638358678.

The spelling of 2921989 in words is "two million, nine hundred twenty-one thousand, nine hundred eighty-nine".