2721789 has 16 divisors (see below), whose sum is σ = 4608640. Its totient is φ = 1555200.

The previous prime is 2721773. The next prime is 2721793. The reversal of 2721789 is 9871272.

It is not a de Polignac number, because 2721789 - 2⁴ = 2721773 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 (2721799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7012 + ... + 7389.

It is an arithmetic number, because the mean of its divisors is an integer number (288040).

2^2721789 is an apocalyptic number.

It is an amenable number.

2721789 is a deficient number, since it is larger than the sum of its proper divisors (1886851).

2721789 is a wasteful number, since it uses less digits than its factorization.

2721789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14417 (or 14411 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 2721789 is about 1649.7845313858. The cubic root of 2721789 is about 139.6212381105.

The spelling of 2721789 in words is "two million, seven hundred twenty-one thousand, seven hundred eighty-nine".