1949791 has 2 divisors, whose sum is σ = 1949792. Its totient is φ = 1949790.

The previous prime is 1949777. The next prime is 1949809. The reversal of 1949791 is 1979491.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1979491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1949791 - 2¹⁵ = 1917023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1949741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974895 + 974896.

It is an arithmetic number, because the mean of its divisors is an integer number (974896).

2^1949791 is an apocalyptic number.

1949791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1949791 is an equidigital number, since it uses as much as digits as its factorization.

1949791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 40.

The square root of 1949791 is about 1396.3491683673. The cubic root of 1949791 is about 124.9288341577.

The spelling of 1949791 in words is "one million, nine hundred forty-nine thousand, seven hundred ninety-one".