68709735 has 16 divisors (see below), whose sum is σ = 122150880. Its totient is φ = 36645120.

The previous prime is 68709731. The next prime is 68709761. The reversal of 68709735 is 53790786.

It is a happy number.

It is not a de Polignac number, because 68709735 - 2² = 68709731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68709731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 254346 + ... + 254615.

It is an arithmetic number, because the mean of its divisors is an integer number (7634430).

Almost surely, 2^68709735 is an apocalyptic number.

68709735 is a deficient number, since it is larger than the sum of its proper divisors (53441145).

68709735 is a wasteful number, since it uses less digits than its factorization.

68709735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508975 (or 508969 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 68709735 is about 8289.1335494127. The cubic root of 68709735 is about 409.5806439949.

The spelling of 68709735 in words is "sixty-eight million, seven hundred nine thousand, seven hundred thirty-five".