2721371689 has 2 divisors, whose sum is σ = 2721371690. Its totient is φ = 2721371688.

The previous prime is 2721371683. The next prime is 2721371693. The reversal of 2721371689 is 9861731272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2720144025 + 1227664 = 52155^2 + 1108^2 .

It is a cyclic number.

It is not a de Polignac number, because 2721371689 - 2⁵ = 2721371657 is a prime.

It is not a weakly prime, because it can be changed into another prime (2721371683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360685844 + 1360685845.

It is an arithmetic number, because the mean of its divisors is an integer number (1360685845).

Almost surely, 2^2721371689 is an apocalyptic number.

It is an amenable number.

2721371689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721371689 is an equidigital number, since it uses as much as digits as its factorization.

2721371689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 46.

The square root of 2721371689 is about 52166.7680520847. The cubic root of 2721371689 is about 1396.1410206182.

The spelling of 2721371689 in words is "two billion, seven hundred twenty-one million, three hundred seventy-one thousand, six hundred eighty-nine".