2164739 has 2 divisors, whose sum is σ = 2164740. Its totient is φ = 2164738.

The previous prime is 2164681. The next prime is 2164787. The reversal of 2164739 is 9374612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2164739 - 2⁸ = 2164483 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2164039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082369 + 1082370.

It is an arithmetic number, because the mean of its divisors is an integer number (1082370).

2^2164739 is an apocalyptic number.

2164739 is a deficient number, since it is larger than the sum of its proper divisors (1).

2164739 is an equidigital number, since it uses as much as digits as its factorization.

2164739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 2164739 is about 1471.3052028726. The cubic root of 2164739 is about 129.3605481457.

The spelling of 2164739 in words is "two million, one hundred sixty-four thousand, seven hundred thirty-nine".