2743038721 has 4 divisors (see below), whose sum is σ = 2887409200. Its totient is φ = 2598668244.

The previous prime is 2743038709. The next prime is 2743038733. The reversal of 2743038721 is 1278303472.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2743038709) and next prime (2743038733).

It is a cyclic number.

It is not a de Polignac number, because 2743038721 - 2⁹ = 2743038209 is a prime.

It is a super-2 number, since 2×2743038721² = 15048522849810631682, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2743038521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72185211 + ... + 72185248.

It is an arithmetic number, because the mean of its divisors is an integer number (721852300).

Almost surely, 2^2743038721 is an apocalyptic number.

It is an amenable number.

2743038721 is a deficient number, since it is larger than the sum of its proper divisors (144370479).

2743038721 is a wasteful number, since it uses less digits than its factorization.

2743038721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144370478.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 2743038721 is about 52374.0271604161. The cubic root of 2743038721 is about 1399.8364980827.

It can be divided in two parts, 274303 and 8721, that added together give a square (283024 = 532²).

The spelling of 2743038721 in words is "two billion, seven hundred forty-three million, thirty-eight thousand, seven hundred twenty-one".