2740079921 has 4 divisors (see below), whose sum is σ = 2740902912. Its totient is φ = 2739256932.

The previous prime is 2740079891. The next prime is 2740079929. The reversal of 2740079921 is 1299700472.

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 a cyclic number.

It is not a de Polignac number, because 2740079921 - 2¹⁸ = 2739817777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2740079929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406481 + ... + 413166.

It is an arithmetic number, because the mean of its divisors is an integer number (685225728).

Almost surely, 2^2740079921 is an apocalyptic number.

It is an amenable number.

2740079921 is a deficient number, since it is larger than the sum of its proper divisors (822991).

2740079921 is an equidigital number, since it uses as much as digits as its factorization.

2740079921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822990.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 2740079921 is about 52345.7727137541. The cubic root of 2740079921 is about 1399.3330021726. Note that the first 3 decimals are identical.

The spelling of 2740079921 in words is "two billion, seven hundred forty million, seventy-nine thousand, nine hundred twenty-one".