830891 has 2 divisors, whose sum is σ = 830892. Its totient is φ = 830890.

The previous prime is 830887. The next prime is 830899. The reversal of 830891 is 198038.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 830891 - 2² = 830887 is a prime.

It is not a weakly prime, because it can be changed into another prime (830899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415445 + 415446.

It is an arithmetic number, because the mean of its divisors is an integer number (415446).

2⁸³⁰⁸⁹¹ is an apocalyptic number.

830891 is a deficient number, since it is larger than the sum of its proper divisors (1).

830891 is an equidigital number, since it uses as much as digits as its factorization.

830891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 830891 is about 911.5322265285. The cubic root of 830891 is about 94.0115799828.

The spelling of 830891 in words is "eight hundred thirty thousand, eight hundred ninety-one".