1091949 has 8 divisors (see below), whose sum is σ = 1532640. Its totient is φ = 689616.

The previous prime is 1091939. The next prime is 1091957. The reversal of 1091949 is 9491901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1091949 - 2⁵ = 1091917 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9522 + ... + 9635.

It is an arithmetic number, because the mean of its divisors is an integer number (191580).

2^1091949 is an apocalyptic number.

1091949 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1091949 is a deficient number, since it is larger than the sum of its proper divisors (440691).

1091949 is a wasteful number, since it uses less digits than its factorization.

1091949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19179.

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

The square root of 1091949 is about 1044.9636357309. The cubic root of 1091949 is about 102.9755495424.

The spelling of 1091949 in words is "one million, ninety-one thousand, nine hundred forty-nine".