689076961 has 2 divisors, whose sum is σ = 689076962. Its totient is φ = 689076960.

The previous prime is 689076953. The next prime is 689076967. The reversal of 689076961 is 169670986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 652547025 + 36529936 = 25545^2 + 6044^2 .

It is a cyclic number.

It is not a de Polignac number, because 689076961 - 2³ = 689076953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 689076899 and 689076908.

It is not a weakly prime, because it can be changed into another prime (689076967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344538480 + 344538481.

It is an arithmetic number, because the mean of its divisors is an integer number (344538481).

Almost surely, 2^689076961 is an apocalyptic number.

It is an amenable number.

689076961 is a deficient number, since it is larger than the sum of its proper divisors (1).

689076961 is an equidigital number, since it uses as much as digits as its factorization.

689076961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 689076961 is about 26250.2754461739. The cubic root of 689076961 is about 883.2613832777.

The spelling of 689076961 in words is "six hundred eighty-nine million, seventy-six thousand, nine hundred sixty-one".