2721667693 has 2 divisors, whose sum is σ = 2721667694. Its totient is φ = 2721667692.

The previous prime is 2721667667. The next prime is 2721667783. The reversal of 2721667693 is 3967661272.

2721667693 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., 2272142889 + 449524804 = 47667^2 + 21202^2 .

It is a cyclic number.

It is not a de Polignac number, because 2721667693 - 2⁹ = 2721667181 is a prime.

It is a super-2 number, since 2×2721667693² = 14814950062239884498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2721667643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360833846 + 1360833847.

It is an arithmetic number, because the mean of its divisors is an integer number (1360833847).

Almost surely, 2^2721667693 is an apocalyptic number.

It is an amenable number.

2721667693 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721667693 is an equidigital number, since it uses as much as digits as its factorization.

2721667693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 49.

The square root of 2721667693 is about 52169.6050684687. The cubic root of 2721667693 is about 1396.1916382713.

The spelling of 2721667693 in words is "two billion, seven hundred twenty-one million, six hundred sixty-seven thousand, six hundred ninety-three".