1949939 has 2 divisors, whose sum is σ = 1949940. Its totient is φ = 1949938.

The previous prime is 1949933. The next prime is 1949947. The reversal of 1949939 is 9399491.

It is a weak prime.

It is an emirp because it is prime and its reverse (9399491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1949939 - 2¹² = 1945843 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1949939.

It is not a weakly prime, because it can be changed into another prime (1949933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974969 + 974970.

It is an arithmetic number, because the mean of its divisors is an integer number (974970).

2^1949939 is an apocalyptic number.

1949939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1949939 is an equidigital number, since it uses as much as digits as its factorization.

1949939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 44.

The square root of 1949939 is about 1396.4021627024. The cubic root of 1949939 is about 124.9319950093.

The spelling of 1949939 in words is "one million, nine hundred forty-nine thousand, nine hundred thirty-nine".