68185969 has 2 divisors, whose sum is σ = 68185970. Its totient is φ = 68185968.

The previous prime is 68185937. The next prime is 68185973. The reversal of 68185969 is 96958186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67897600 + 288369 = 8240^2 + 537^2 .

It is a cyclic number.

It is not a de Polignac number, because 68185969 - 2⁵ = 68185937 is a prime.

It is a super-2 number, since 2×68185969² = 9298652736937922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68185979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34092984 + 34092985.

It is an arithmetic number, because the mean of its divisors is an integer number (34092985).

Almost surely, 2^68185969 is an apocalyptic number.

It is an amenable number.

68185969 is a deficient number, since it is larger than the sum of its proper divisors (1).

68185969 is an equidigital number, since it uses as much as digits as its factorization.

68185969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 52.

The square root of 68185969 is about 8257.4795791452. The cubic root of 68185969 is about 408.5372603864.

The spelling of 68185969 in words is "sixty-eight million, one hundred eighty-five thousand, nine hundred sixty-nine".