1949091 has 4 divisors (see below), whose sum is σ = 2598792. Its totient is φ = 1299392.

The previous prime is 1949081. The next prime is 1949111. The reversal of 1949091 is 1909491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1949091 - 2¹⁹ = 1424803 is a prime.

It is a D-number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1949081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324846 + ... + 324851.

It is an arithmetic number, because the mean of its divisors is an integer number (649698).

2^1949091 is an apocalyptic number.

1949091 is a deficient number, since it is larger than the sum of its proper divisors (649701).

1949091 is an equidigital number, since it uses as much as digits as its factorization.

1949091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649700.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 1949091 is about 1396.0984922275. The cubic root of 1949091 is about 124.9138820165.

The spelling of 1949091 in words is "one million, nine hundred forty-nine thousand, ninety-one".