689594131 has 2 divisors, whose sum is σ = 689594132. Its totient is φ = 689594130.

The previous prime is 689594117. The next prime is 689594159. The reversal of 689594131 is 131495986.

689594131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689594131 - 2¹¹ = 689592083 is a prime.

It is a super-2 number, since 2×689594131² = 951080131019290322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (689594831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344797065 + 344797066.

It is an arithmetic number, because the mean of its divisors is an integer number (344797066).

Almost surely, 2^689594131 is an apocalyptic number.

689594131 is a deficient number, since it is larger than the sum of its proper divisors (1).

689594131 is an equidigital number, since it uses as much as digits as its factorization.

689594131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 46.

The square root of 689594131 is about 26260.1243523331. The cubic root of 689594131 is about 883.4822981556.

It can be divided in two parts, 689594 and 131, that added together give a triangular number (689725 = T₁₁₇₄).

The spelling of 689594131 in words is "six hundred eighty-nine million, five hundred ninety-four thousand, one hundred thirty-one".