2740721407 has 4 divisors (see below), whose sum is σ = 2741322976. Its totient is φ = 2740119840.

The previous prime is 2740721381. The next prime is 2740721413. The reversal of 2740721407 is 7041270472.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2740721407 - 2⁷ = 2740721279 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 (2740721437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293898 + ... + 303079.

It is an arithmetic number, because the mean of its divisors is an integer number (685330744).

Almost surely, 2^2740721407 is an apocalyptic number.

2740721407 is a deficient number, since it is larger than the sum of its proper divisors (601569).

2740721407 is an equidigital number, since it uses as much as digits as its factorization.

2740721407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601568.

The product of its (nonzero) digits is 21952, while the sum is 34.

The square root of 2740721407 is about 52351.8997458545. The cubic root of 2740721407 is about 1399.4421939377.

Adding to 2740721407 its reverse (7041270472), we get a palindrome (9781991879).

The spelling of 2740721407 in words is "two billion, seven hundred forty million, seven hundred twenty-one thousand, four hundred seven".