690593489 has 2 divisors, whose sum is σ = 690593490. Its totient is φ = 690593488.

The previous prime is 690593471. The next prime is 690593507. The reversal of 690593489 is 984395096.

690593489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (690593471) and next prime (690593507).

It can be written as a sum of positive squares in only one way, i.e., 639685264 + 50908225 = 25292^2 + 7135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690593489 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 690593489.

It is not a weakly prime, because it can be changed into another prime (690593429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345296744 + 345296745.

It is an arithmetic number, because the mean of its divisors is an integer number (345296745).

Almost surely, 2^690593489 is an apocalyptic number.

It is an amenable number.

690593489 is a deficient number, since it is larger than the sum of its proper divisors (1).

690593489 is an equidigital number, since it uses as much as digits as its factorization.

690593489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The square root of 690593489 is about 26279.1455150277. The cubic root of 690593489 is about 883.9088722324.

The spelling of 690593489 in words is "six hundred ninety million, five hundred ninety-three thousand, four hundred eighty-nine".