2638747 has 2 divisors, whose sum is σ = 2638748. Its totient is φ = 2638746.

The previous prime is 2638717. The next prime is 2638771. The reversal of 2638747 is 7478362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2638747 - 2¹⁵ = 2605979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2638717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319373 + 1319374.

It is an arithmetic number, because the mean of its divisors is an integer number (1319374).

2^2638747 is an apocalyptic number.

2638747 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638747 is an equidigital number, since it uses as much as digits as its factorization.

2638747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 37.

The square root of 2638747 is about 1624.4220510692. The cubic root of 2638747 is about 138.1865955837.

The spelling of 2638747 in words is "two million, six hundred thirty-eight thousand, seven hundred forty-seven".