2718439021 has 2 divisors, whose sum is σ = 2718439022. Its totient is φ = 2718439020.

The previous prime is 2718439019. The next prime is 2718439049. The reversal of 2718439021 is 1209348172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2707641225 + 10797796 = 52035^2 + 3286^2 .

It is a cyclic number.

It is not a de Polignac number, because 2718439021 - 2¹ = 2718439019 is a prime.

Together with 2718439019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2718439921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1359219510 + 1359219511.

It is an arithmetic number, because the mean of its divisors is an integer number (1359219511).

Almost surely, 2^2718439021 is an apocalyptic number.

It is an amenable number.

2718439021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2718439021 is an equidigital number, since it uses as much as digits as its factorization.

2718439021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 2718439021 is about 52138.6518908957. The cubic root of 2718439021 is about 1395.6393263481.

The spelling of 2718439021 in words is "two billion, seven hundred eighteen million, four hundred thirty-nine thousand, twenty-one".