2740139 has 2 divisors, whose sum is σ = 2740140. Its totient is φ = 2740138.

The previous prime is 2740093. The next prime is 2740141. The reversal of 2740139 is 9310472.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2740139 - 2¹² = 2736043 is a prime.

Together with 2740141, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2740169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1370069 + 1370070.

It is an arithmetic number, because the mean of its divisors is an integer number (1370070).

2^2740139 is an apocalyptic number.

2740139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2740139 is an equidigital number, since it uses as much as digits as its factorization.

2740139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 2740139 is about 1655.3365216777. The cubic root of 2740139 is about 139.9343059130.

The spelling of 2740139 in words is "two million, seven hundred forty thousand, one hundred thirty-nine".