689476441397 has 2 divisors, whose sum is σ = 689476441398. Its totient is φ = 689476441396.

The previous prime is 689476441373. The next prime is 689476441403. The reversal of 689476441397 is 793144674986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 450356419396 + 239120022001 = 671086^2 + 488999^2 .

It is a cyclic number.

It is not a de Polignac number, because 689476441397 - 2⁶ = 689476441333 is a prime.

It is a super-3 number, since 3×689476441397³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689476446397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344738220698 + 344738220699.

It is an arithmetic number, because the mean of its divisors is an integer number (344738220699).

Almost surely, 2^689476441397 is an apocalyptic number.

It is an amenable number.

689476441397 is a deficient number, since it is larger than the sum of its proper divisors (1).

689476441397 is an equidigital number, since it uses as much as digits as its factorization.

689476441397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 219469824, while the sum is 68.

The spelling of 689476441397 in words is "six hundred eighty-nine billion, four hundred seventy-six million, four hundred forty-one thousand, three hundred ninety-seven".