85719650969 has 2 divisors, whose sum is σ = 85719650970. Its totient is φ = 85719650968.

The previous prime is 85719650923. The next prime is 85719650983. The reversal of 85719650969 is 96905691758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84329256025 + 1390394944 = 290395^2 + 37288^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85719650969 is a prime.

It is a super-2 number, since 2×85719650969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85719650909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42859825484 + 42859825485.

It is an arithmetic number, because the mean of its divisors is an integer number (42859825485).

Almost surely, 2^85719650969 is an apocalyptic number.

It is an amenable number.

85719650969 is a deficient number, since it is larger than the sum of its proper divisors (1).

85719650969 is an equidigital number, since it uses as much as digits as its factorization.

85719650969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36741600, while the sum is 65.

The spelling of 85719650969 in words is "eighty-five billion, seven hundred nineteen million, six hundred fifty thousand, nine hundred sixty-nine".