831604401 has 10 divisors (see below), whose sum is σ = 1242273362. Its totient is φ = 554402880.

The previous prime is 831604381. The next prime is 831604427. The reversal of 831604401 is 104406138.

It can be written as a sum of positive squares in only one way, i.e., 426629025 + 404975376 = 20655^2 + 20124^2 .

It is not a de Polignac number, because 831604401 - 2⁶ = 831604337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (831604441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5133280 + ... + 5133441.

Almost surely, 2^831604401 is an apocalyptic number.

831604401 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

831604401 is a deficient number, since it is larger than the sum of its proper divisors (410668961).

831604401 is a wasteful number, since it uses less digits than its factorization.

831604401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10266733 (or 10266724 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 831604401 is about 28837.5519245306. The cubic root of 831604401 is about 940.3847832424.

The spelling of 831604401 in words is "eight hundred thirty-one million, six hundred four thousand, four hundred one".