831420725389 has 2 divisors, whose sum is σ = 831420725390. Its totient is φ = 831420725388.

The previous prime is 831420725383. The next prime is 831420725413. The reversal of 831420725389 is 983527024138.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 745387036164 + 86033689225 = 863358^2 + 293315^2 .

It is a cyclic number.

It is not a de Polignac number, because 831420725389 - 2¹⁷ = 831420594317 is a prime.

It is a super-3 number, since 3×831420725389³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (831420725383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415710362694 + 415710362695.

It is an arithmetic number, because the mean of its divisors is an integer number (415710362695).

Almost surely, 2^831420725389 is an apocalyptic number.

It is an amenable number.

831420725389 is a deficient number, since it is larger than the sum of its proper divisors (1).

831420725389 is an equidigital number, since it uses as much as digits as its factorization.

831420725389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 831420725389 in words is "eight hundred thirty-one billion, four hundred twenty million, seven hundred twenty-five thousand, three hundred eighty-nine".