68969689 has 2 divisors, whose sum is σ = 68969690. Its totient is φ = 68969688.

The previous prime is 68969687. The next prime is 68969707. The reversal of 68969689 is 98696986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52809289 + 16160400 = 7267^2 + 4020^2 .

It is a cyclic number.

It is not a de Polignac number, because 68969689 - 2¹ = 68969687 is a prime.

Together with 68969687, it forms a pair of twin primes.

68969689 is a strobogrammatic number because it is the same when read upside-down.

It is not a weakly prime, because it can be changed into another prime (68969683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34484844 + 34484845.

It is an arithmetic number, because the mean of its divisors is an integer number (34484845).

Almost surely, 2^68969689 is an apocalyptic number.

It is an amenable number.

68969689 is a deficient number, since it is larger than the sum of its proper divisors (1).

68969689 is an equidigital number, since it uses as much as digits as its factorization.

68969689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10077696, while the sum is 61.

The square root of 68969689 is about 8304.7991547057. The cubic root of 68969689 is about 410.0965249635.

The spelling of 68969689 in words is "sixty-eight million, nine hundred sixty-nine thousand, six hundred eighty-nine".