689039983 has 2 divisors, whose sum is σ = 689039984. Its totient is φ = 689039982.

The previous prime is 689039977. The next prime is 689040013. The reversal of 689039983 is 389930986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689039983 - 2¹⁷ = 688908911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689039933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344519991 + 344519992.

It is an arithmetic number, because the mean of its divisors is an integer number (344519992).

Almost surely, 2^689039983 is an apocalyptic number.

689039983 is a deficient number, since it is larger than the sum of its proper divisors (1).

689039983 is an equidigital number, since it uses as much as digits as its factorization.

689039983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The square root of 689039983 is about 26249.5711012580. The cubic root of 689039983 is about 883.2455834829.

The spelling of 689039983 in words is "six hundred eighty-nine million, thirty-nine thousand, nine hundred eighty-three".