830907891 has 24 divisors (see below), whose sum is σ = 1311416496. Its totient is φ = 502770240.

The previous prime is 830907881. The next prime is 830907893. The reversal of 830907891 is 198709038.

It is not a de Polignac number, because 830907891 - 2¹⁸ = 830645747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (830907893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58221 + ... + 71073.

It is an arithmetic number, because the mean of its divisors is an integer number (54642354).

Almost surely, 2^830907891 is an apocalyptic number.

830907891 is a deficient number, since it is larger than the sum of its proper divisors (480508605).

830907891 is a wasteful number, since it uses less digits than its factorization.

830907891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13523 (or 13520 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 830907891 is about 28825.4729536221. The cubic root of 830907891 is about 940.1221702535.

The spelling of 830907891 in words is "eight hundred thirty million, nine hundred seven thousand, eight hundred ninety-one".