2194739 has 2 divisors, whose sum is σ = 2194740. Its totient is φ = 2194738.

The previous prime is 2194723. The next prime is 2194757. The reversal of 2194739 is 9374912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2194739 - 2⁴ = 2194723 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2194699 and 2194708.

It is not a weakly prime, because it can be changed into another prime (2194639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1097369 + 1097370.

It is an arithmetic number, because the mean of its divisors is an integer number (1097370).

2^2194739 is an apocalyptic number.

2194739 is a deficient number, since it is larger than the sum of its proper divisors (1).

2194739 is an equidigital number, since it uses as much as digits as its factorization.

2194739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 35.

The square root of 2194739 is about 1481.4651531508. The cubic root of 2194739 is about 129.9553890322.

The spelling of 2194739 in words is "two million, one hundred ninety-four thousand, seven hundred thirty-nine".