831398401 has 2 divisors, whose sum is σ = 831398402. Its totient is φ = 831398400.

The previous prime is 831398389. The next prime is 831398417. The reversal of 831398401 is 104893138.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 701985025 + 129413376 = 26495^2 + 11376^2 .

It is a cyclic number.

It is not a de Polignac number, because 831398401 - 2¹⁷ = 831267329 is a prime.

It is not a weakly prime, because it can be changed into another prime (831398471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415699200 + 415699201.

It is an arithmetic number, because the mean of its divisors is an integer number (415699201).

Almost surely, 2^831398401 is an apocalyptic number.

It is an amenable number.

831398401 is a deficient number, since it is larger than the sum of its proper divisors (1).

831398401 is an equidigital number, since it uses as much as digits as its factorization.

831398401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 831398401 is about 28833.9799715544. The cubic root of 831398401 is about 940.3071280244.

The spelling of 831398401 in words is "eight hundred thirty-one million, three hundred ninety-eight thousand, four hundred one".