831530897 has 2 divisors, whose sum is σ = 831530898. Its totient is φ = 831530896.

The previous prime is 831530863. The next prime is 831530923. The reversal of 831530897 is 798035138.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 757845841 + 73685056 = 27529^2 + 8584^2 .

It is a cyclic number.

It is not a de Polignac number, because 831530897 - 2⁸ = 831530641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (831530857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415765448 + 415765449.

It is an arithmetic number, because the mean of its divisors is an integer number (415765449).

Almost surely, 2^831530897 is an apocalyptic number.

It is an amenable number.

831530897 is a deficient number, since it is larger than the sum of its proper divisors (1).

831530897 is an equidigital number, since it uses as much as digits as its factorization.

831530897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 831530897 is about 28836.2774469937. The cubic root of 831530897 is about 940.3570761261.

The spelling of 831530897 in words is "eight hundred thirty-one million, five hundred thirty thousand, eight hundred ninety-seven".