891983 has 2 divisors, whose sum is σ = 891984. Its totient is φ = 891982.

The previous prime is 891967. The next prime is 891991. The reversal of 891983 is 389198.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 891983 - 2⁴ = 891967 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (891923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445991 + 445992.

It is an arithmetic number, because the mean of its divisors is an integer number (445992).

2⁸⁹¹⁹⁸³ is an apocalyptic number.

891983 is a deficient number, since it is larger than the sum of its proper divisors (1).

891983 is an equidigital number, since it uses as much as digits as its factorization.

891983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 891983 is about 944.4485163311. The cubic root of 891983 is about 96.2614041696.

The spelling of 891983 in words is "eight hundred ninety-one thousand, nine hundred eighty-three".