1906091 has 8 divisors (see below), whose sum is σ = 2201904. Its totient is φ = 1630720.

The previous prime is 1906087. The next prime is 1906109.

1906091 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 1906091 - 2² = 1906087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1906091.

It is not an unprimeable number, because it can be changed into a prime (1906391) 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, 4910 + ... + 5283.

It is an arithmetic number, because the mean of its divisors is an integer number (275238).

2^1906091 is an apocalyptic number.

1906091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1906091 is a deficient number, since it is larger than the sum of its proper divisors (295813).

1906091 is a wasteful number, since it uses less digits than its factorization.

1906091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10221.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 1906091 is about 1380.6125452132. The cubic root of 1906091 is about 123.9884441191.

The spelling of 1906091 in words is "one million, nine hundred six thousand, ninety-one".