2651389 has 4 divisors (see below), whose sum is σ = 2855356. Its totient is φ = 2447424.

The previous prime is 2651387. The next prime is 2651413. The reversal of 2651389 is 9831562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1512900 + 1138489 = 1230^2 + 1067^2 .

It is a cyclic number.

It is not a de Polignac number, because 2651389 - 2¹ = 2651387 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 (2651387) 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 3 ways as a sum of consecutive naturals, for example, 101964 + ... + 101989.

It is an arithmetic number, because the mean of its divisors is an integer number (713839).

2^2651389 is an apocalyptic number.

It is an amenable number.

2651389 is a deficient number, since it is larger than the sum of its proper divisors (203967).

2651389 is a wasteful number, since it uses less digits than its factorization.

2651389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203966.

The product of its digits is 12960, while the sum is 34.

The square root of 2651389 is about 1628.3086316789. The cubic root of 2651389 is about 138.4069239578.

It can be divided in two parts, 26 and 51389, that added together give a palindrome (51415).

The spelling of 2651389 in words is "two million, six hundred fifty-one thousand, three hundred eighty-nine".