2740156789 has 2 divisors, whose sum is σ = 2740156790. Its totient is φ = 2740156788.

The previous prime is 2740156787. The next prime is 2740156879. The reversal of 2740156789 is 9876510472.

Together with next prime (2740156879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2316496900 + 423659889 = 48130^2 + 20583^2 .

It is a cyclic number.

It is not a de Polignac number, because 2740156789 - 2¹ = 2740156787 is a prime.

Together with 2740156787, 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 (2740156787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1370078394 + 1370078395.

It is an arithmetic number, because the mean of its divisors is an integer number (1370078395).

Almost surely, 2^2740156789 is an apocalyptic number.

It is an amenable number.

2740156789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2740156789 is an equidigital number, since it uses as much as digits as its factorization.

2740156789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846720, while the sum is 49.

The square root of 2740156789 is about 52346.5069417244. The cubic root of 2740156789 is about 1399.3460873048.

The spelling of 2740156789 in words is "two billion, seven hundred forty million, one hundred fifty-six thousand, seven hundred eighty-nine".