2771389 has 2 divisors, whose sum is σ = 2771390. Its totient is φ = 2771388.

The previous prime is 2771383. The next prime is 2771401. The reversal of 2771389 is 9831772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2576025 + 195364 = 1605^2 + 442^2 .

It is a cyclic number.

It is not a de Polignac number, because 2771389 - 2³ = 2771381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2771381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1385694 + 1385695.

It is an arithmetic number, because the mean of its divisors is an integer number (1385695).

2^2771389 is an apocalyptic number.

It is an amenable number.

2771389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2771389 is an equidigital number, since it uses as much as digits as its factorization.

2771389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 2771389 is about 1664.7489300192. The cubic root of 2771389 is about 140.4642580782.

It can be divided in two parts, 2771 and 389, that added together give a triangular number (3160 = T₇₉).

The spelling of 2771389 in words is "two million, seven hundred seventy-one thousand, three hundred eighty-nine".