2638771 has 2 divisors, whose sum is σ = 2638772. Its totient is φ = 2638770.

The previous prime is 2638747. The next prime is 2638787. The reversal of 2638771 is 1778362.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2638771 is a prime.

It is a super-2 number, since 2×2638771² = 13926224780882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2638271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319385 + 1319386.

It is an arithmetic number, because the mean of its divisors is an integer number (1319386).

2^2638771 is an apocalyptic number.

2638771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2638771 is an equidigital number, since it uses as much as digits as its factorization.

2638771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 34.

The square root of 2638771 is about 1624.4294382952. The cubic root of 2638771 is about 138.1870145285.

The spelling of 2638771 in words is "two million, six hundred thirty-eight thousand, seven hundred seventy-one".