2638369 has 2 divisors, whose sum is σ = 2638370. Its totient is φ = 2638368.

The previous prime is 2638367. The next prime is 2638381. The reversal of 2638369 is 9638362.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1345600 + 1292769 = 1160^2 + 1137^2 .

It is a cyclic number.

It is not a de Polignac number, because 2638369 - 2¹ = 2638367 is a prime.

It is a super-2 number, since 2×2638369² = 13921981960322, which contains 22 as substring.

Together with 2638367, it forms a pair of twin primes.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2¹³ + 6² + 3⁵ + 8⁷ + 3¹² + 6⁴ + 9 .

2638369 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2638367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319184 + 1319185.

It is an arithmetic number, because the mean of its divisors is an integer number (1319185).

2^2638369 is an apocalyptic number.

It is an amenable number.

2638369 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638369 is an equidigital number, since it uses as much as digits as its factorization.

2638369 is an evil number, because the sum of its binary digits is even.

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

The square root of 2638369 is about 1624.3056978291. The cubic root of 2638369 is about 138.1799968675.

The spelling of 2638369 in words is "two million, six hundred thirty-eight thousand, three hundred sixty-nine".