2620139 has 2 divisors, whose sum is σ = 2620140. Its totient is φ = 2620138.

The previous prime is 2620129. The next prime is 2620141. The reversal of 2620139 is 9310262.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2620139 is a prime.

Together with 2620141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2620129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1310069 + 1310070.

It is an arithmetic number, because the mean of its divisors is an integer number (1310070).

2^2620139 is an apocalyptic number.

2620139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2620139 is an equidigital number, since it uses as much as digits as its factorization.

2620139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 2620139 is about 1618.6843422978. The cubic root of 2620139 is about 137.8610061699.

The spelling of 2620139 in words is "two million, six hundred twenty thousand, one hundred thirty-nine".