69081689 has 2 divisors, whose sum is σ = 69081690. Its totient is φ = 69081688.

The previous prime is 69081667. The next prime is 69081709. The reversal of 69081689 is 98618096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59521225 + 9560464 = 7715^2 + 3092^2 .

It is a cyclic number.

It is not a de Polignac number, because 69081689 - 2¹⁶ = 69016153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69081289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34540844 + 34540845.

It is an arithmetic number, because the mean of its divisors is an integer number (34540845).

Almost surely, 2^69081689 is an apocalyptic number.

It is an amenable number.

69081689 is a deficient number, since it is larger than the sum of its proper divisors (1).

69081689 is an equidigital number, since it uses as much as digits as its factorization.

69081689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 69081689 is about 8311.5395084184. The cubic root of 69081689 is about 410.3183904018.

The spelling of 69081689 in words is "sixty-nine million, eighty-one thousand, six hundred eighty-nine".