2921389 has 8 divisors (see below), whose sum is σ = 2987712. Its totient is φ = 2856000.

The previous prime is 2921371. The next prime is 2921417. The reversal of 2921389 is 9831292.

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 2921389 - 2⁹ = 2920877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2921329) 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, 11514 + ... + 11764.

It is an arithmetic number, because the mean of its divisors is an integer number (373464).

2^2921389 is an apocalyptic number.

It is an amenable number.

2921389 is a deficient number, since it is larger than the sum of its proper divisors (66323).

2921389 is a wasteful number, since it uses less digits than its factorization.

2921389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467.

The product of its digits is 7776, while the sum is 34.

The square root of 2921389 is about 1709.2071261260. The cubic root of 2921389 is about 142.9540498198.

Subtracting 2921389 from its reverse (9831292), we obtain a triangular number (6909903 = T₃₇₁₇).

It can be divided in two parts, 292 and 1389, that added together give a square (1681 = 41²).

The spelling of 2921389 in words is "two million, nine hundred twenty-one thousand, three hundred eighty-nine".