689132243 has 2 divisors, whose sum is σ = 689132244. Its totient is φ = 689132242.

The previous prime is 689132239. The next prime is 689132267. The reversal of 689132243 is 342231986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689132243 - 2² = 689132239 is a prime.

It is a super-2 number, since 2×689132243² = 949806496684422098, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 689132197 and 689132206.

It is not a weakly prime, because it can be changed into another prime (689132273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344566121 + 344566122.

It is an arithmetic number, because the mean of its divisors is an integer number (344566122).

Almost surely, 2^689132243 is an apocalyptic number.

689132243 is a deficient number, since it is larger than the sum of its proper divisors (1).

689132243 is an equidigital number, since it uses as much as digits as its factorization.

689132243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 689132243 is about 26251.3284044827. The cubic root of 689132243 is about 883.2850028697.

The spelling of 689132243 in words is "six hundred eighty-nine million, one hundred thirty-two thousand, two hundred forty-three".