1891093 has 8 divisors (see below), whose sum is σ = 1990656. Its totient is φ = 1794000.

The previous prime is 1891073. The next prime is 1891103. The reversal of 1891093 is 3901981.

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 1891093 - 2¹⁷ = 1760021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1891073) 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, 1068 + ... + 2218.

It is an arithmetic number, because the mean of its divisors is an integer number (248832).

2^1891093 is an apocalyptic number.

It is an amenable number.

1891093 is a deficient number, since it is larger than the sum of its proper divisors (99563).

1891093 is a wasteful number, since it uses less digits than its factorization.

1891093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1891093 is about 1375.1701712879. The cubic root of 1891093 is about 123.6623880777.

The spelling of 1891093 in words is "one million, eight hundred ninety-one thousand, ninety-three".