2677861 has 2 divisors, whose sum is σ = 2677862. Its totient is φ = 2677860.

The previous prime is 2677847. The next prime is 2677901. The reversal of 2677861 is 1687762.

It is a happy number.

2677861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2160900 + 516961 = 1470^2 + 719^2 .

It is a cyclic number.

It is not a de Polignac number, because 2677861 - 2⁷ = 2677733 is a prime.

It is an Ulam number.

2677861 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2677861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2657861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1338930 + 1338931.

It is an arithmetic number, because the mean of its divisors is an integer number (1338931).

2^2677861 is an apocalyptic number.

It is an amenable number.

2677861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2677861 is an equidigital number, since it uses as much as digits as its factorization.

2677861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 37.

The square root of 2677861 is about 1636.4171228632. The cubic root of 2677861 is about 138.8660269096.

Subtracting from 2677861 its reverse (1687762), we obtain a palindrome (990099).

It can be divided in two parts, 267 and 7861, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 2677861 in words is "two million, six hundred seventy-seven thousand, eight hundred sixty-one".