689353393 has 2 divisors, whose sum is σ = 689353394. Its totient is φ = 689353392.

The previous prime is 689353369. The next prime is 689353397. The reversal of 689353393 is 393353986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 568727104 + 120626289 = 23848^2 + 10983^2 .

It is a cyclic number.

It is not a de Polignac number, because 689353393 - 2⁵ = 689353361 is a prime.

It is a super-2 number, since 2×689353393² = 950416200881224898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (689353397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344676696 + 344676697.

It is an arithmetic number, because the mean of its divisors is an integer number (344676697).

Almost surely, 2^689353393 is an apocalyptic number.

It is an amenable number.

689353393 is a deficient number, since it is larger than the sum of its proper divisors (1).

689353393 is an equidigital number, since it uses as much as digits as its factorization.

689353393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 49.

The square root of 689353393 is about 26255.5402343962. The cubic root of 689353393 is about 883.3794780055.

The spelling of 689353393 in words is "six hundred eighty-nine million, three hundred fifty-three thousand, three hundred ninety-three".