689363131 has 2 divisors, whose sum is σ = 689363132. Its totient is φ = 689363130.

The previous prime is 689363123. The next prime is 689363159. The reversal of 689363131 is 131363986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689363131 - 2³ = 689363123 is a prime.

It is a super-2 number, since 2×689363131² = 950443052764246322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (689366131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344681565 + 344681566.

It is an arithmetic number, because the mean of its divisors is an integer number (344681566).

Almost surely, 2^689363131 is an apocalyptic number.

689363131 is a deficient number, since it is larger than the sum of its proper divisors (1).

689363131 is an equidigital number, since it uses as much as digits as its factorization.

689363131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 40.

The square root of 689363131 is about 26255.7256803159. The cubic root of 689363131 is about 883.3836376083.

The spelling of 689363131 in words is "six hundred eighty-nine million, three hundred sixty-three thousand, one hundred thirty-one".