68135769 has 16 divisors (see below), whose sum is σ = 108707200. Its totient is φ = 41929488.

The previous prime is 68135741. The next prime is 68135773. The reversal of 68135769 is 96753186.

It is a happy number.

68135769 is a `hidden beast` number, since 68 + 13 + 576 + 9 = 666.

It is not a de Polignac number, because 68135769 - 2⁸ = 68135513 is a prime.

It is a super-2 number, since 2×68135769² = 9284966034442722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68135869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96709 + ... + 97410.

It is an arithmetic number, because the mean of its divisors is an integer number (6794200).

Almost surely, 2^68135769 is an apocalyptic number.

It is an amenable number.

68135769 is a deficient number, since it is larger than the sum of its proper divisors (40571431).

68135769 is a wasteful number, since it uses less digits than its factorization.

68135769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194141 (or 194135 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 68135769 is about 8254.4393510401. The cubic root of 68135769 is about 408.4369777536.

The spelling of 68135769 in words is "sixty-eight million, one hundred thirty-five thousand, seven hundred sixty-nine".