2861711621 has 4 divisors (see below), whose sum is σ = 2862502092. Its totient is φ = 2860921152.

The previous prime is 2861711603. The next prime is 2861711623. The reversal of 2861711621 is 1261171682.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1639440100 + 1222271521 = 40490^2 + 34961^2 .

It is a cyclic number.

It is not a de Polignac number, because 2861711621 - 2²⁶ = 2794602757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2861711623) 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 in 3 ways as a sum of consecutive naturals, for example, 389780 + ... + 397053.

It is an arithmetic number, because the mean of its divisors is an integer number (715625523).

Almost surely, 2^2861711621 is an apocalyptic number.

It is an amenable number.

2861711621 is a deficient number, since it is larger than the sum of its proper divisors (790471).

2861711621 is an equidigital number, since it uses as much as digits as its factorization.

2861711621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790470.

The product of its digits is 8064, while the sum is 35.

The square root of 2861711621 is about 53494.9681839330. The cubic root of 2861711621 is about 1419.7393591914.

The spelling of 2861711621 in words is "two billion, eight hundred sixty-one million, seven hundred eleven thousand, six hundred twenty-one".