2663389 has 4 divisors (see below), whose sum is σ = 2755260. Its totient is φ = 2571520.

The previous prime is 2663359. The next prime is 2663393. The reversal of 2663389 is 9833662.

2663389 = T₄₁₄ + T₄₁₅ + ... + T₄₄₂.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9833662 = 2 ⋅4916831.

It can be written as a sum of positive squares in 2 ways, for example, as 1822500 + 840889 = 1350^2 + 917^2 .

It is a cyclic number.

It is not a de Polignac number, because 2663389 - 2⁵ = 2663357 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 (2663359) 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, 45892 + ... + 45949.

It is an arithmetic number, because the mean of its divisors is an integer number (688815).

2^2663389 is an apocalyptic number.

2663389 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2663389 is a deficient number, since it is larger than the sum of its proper divisors (91871).

2663389 is an equidigital number, since it uses as much as digits as its factorization.

2663389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91870.

The product of its digits is 46656, while the sum is 37.

The square root of 2663389 is about 1631.9892769256. The cubic root of 2663389 is about 138.6154163981.

It can be divided in two parts, 266 and 3389, that added together give a triangular number (3655 = T₈₅).

The spelling of 2663389 in words is "two million, six hundred sixty-three thousand, three hundred eighty-nine".