1949947 has 2 divisors, whose sum is σ = 1949948. Its totient is φ = 1949946.

The previous prime is 1949939. The next prime is 1949999. The reversal of 1949947 is 7499491.

It is a weak prime.

It is an emirp because it is prime and its reverse (7499491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1949947 - 2³ = 1949939 is a prime.

It is not a weakly prime, because it can be changed into another prime (1946947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974973 + 974974.

It is an arithmetic number, because the mean of its divisors is an integer number (974974).

2^1949947 is an apocalyptic number.

1949947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1949947 is an equidigital number, since it uses as much as digits as its factorization.

1949947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 1949947 is about 1396.4050272038. The cubic root of 1949947 is about 124.9321658616.

The spelling of 1949947 in words is "one million, nine hundred forty-nine thousand, nine hundred forty-seven".