2638469 has 2 divisors, whose sum is σ = 2638470. Its totient is φ = 2638468.

The previous prime is 2638411. The next prime is 2638477. The reversal of 2638469 is 9648362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1350244 + 1288225 = 1162^2 + 1135^2 .

It is a cyclic number.

It is not a de Polignac number, because 2638469 - 2²⁰ = 1589893 is a prime.

It is a super-2 number, since 2×2638469² = 13923037327922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2638369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319234 + 1319235.

It is an arithmetic number, because the mean of its divisors is an integer number (1319235).

2^2638469 is an apocalyptic number.

It is an amenable number.

2638469 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638469 is an equidigital number, since it uses as much as digits as its factorization.

2638469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 38.

The square root of 2638469 is about 1624.3364799203. The cubic root of 2638469 is about 138.1817426209.

The spelling of 2638469 in words is "two million, six hundred thirty-eight thousand, four hundred sixty-nine".