689095591069 has 2 divisors, whose sum is σ = 689095591070. Its totient is φ = 689095591068.

The previous prime is 689095591021. The next prime is 689095591091. The reversal of 689095591069 is 960195590986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 368103091225 + 320992499844 = 606715^2 + 566562^2 .

It is a cyclic number.

It is not a de Polignac number, because 689095591069 - 2²¹ = 689093493917 is a prime.

It is a super-2 number, since 2×689095591069² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 689095590995 and 689095591013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689095591669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344547795534 + 344547795535.

It is an arithmetic number, because the mean of its divisors is an integer number (344547795535).

Almost surely, 2^689095591069 is an apocalyptic number.

It is an amenable number.

689095591069 is a deficient number, since it is larger than the sum of its proper divisors (1).

689095591069 is an equidigital number, since it uses as much as digits as its factorization.

689095591069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47239200, while the sum is 67.

The spelling of 689095591069 in words is "six hundred eighty-nine billion, ninety-five million, five hundred ninety-one thousand, sixty-nine".