689240203 has 2 divisors, whose sum is σ = 689240204. Its totient is φ = 689240202.

The previous prime is 689240171. The next prime is 689240213. The reversal of 689240203 is 302042986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689240203 - 2⁵ = 689240171 is a prime.

It is not a weakly prime, because it can be changed into another prime (689240213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344620101 + 344620102.

It is an arithmetic number, because the mean of its divisors is an integer number (344620102).

Almost surely, 2^689240203 is an apocalyptic number.

689240203 is a deficient number, since it is larger than the sum of its proper divisors (1).

689240203 is an equidigital number, since it uses as much as digits as its factorization.

689240203 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 34.

The square root of 689240203 is about 26253.3846008472. The cubic root of 689240203 is about 883.3311258360.

The spelling of 689240203 in words is "six hundred eighty-nine million, two hundred forty thousand, two hundred three".