830591057 has 4 divisors (see below), whose sum is σ = 831069876. Its totient is φ = 830112240.

The previous prime is 830591051. The next prime is 830591063. The reversal of 830591057 is 750195038.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 750195038 = 2 ⋅375097519.

It is an interprime number because it is at equal distance from previous prime (830591051) and next prime (830591063).

It can be written as a sum of positive squares in 2 ways, for example, as 250937281 + 579653776 = 15841^2 + 24076^2 .

It is a cyclic number.

It is not a de Polignac number, because 830591057 - 2⁶ = 830590993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 830591057.

It is not an unprimeable number, because it can be changed into a prime (830591051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236798 + ... + 240279.

It is an arithmetic number, because the mean of its divisors is an integer number (207767469).

Almost surely, 2^830591057 is an apocalyptic number.

It is an amenable number.

830591057 is a deficient number, since it is larger than the sum of its proper divisors (478819).

830591057 is a wasteful number, since it uses less digits than its factorization.

830591057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478818.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 830591057 is about 28819.9767001988. The cubic root of 830591057 is about 940.0026622076.

The spelling of 830591057 in words is "eight hundred thirty million, five hundred ninety-one thousand, fifty-seven".