68710731 has 4 divisors (see below), whose sum is σ = 91614312. Its totient is φ = 45807152.

The previous prime is 68710723. The next prime is 68710769. The reversal of 68710731 is 13701786.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68710731 - 2³ = 68710723 is a prime.

It is a super-2 number, since 2×68710731² = 9442329109108722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68710692 and 68710701.

It is not an unprimeable number, because it can be changed into a prime (68710721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11451786 + ... + 11451791.

It is an arithmetic number, because the mean of its divisors is an integer number (22903578).

Almost surely, 2^68710731 is an apocalyptic number.

68710731 is a deficient number, since it is larger than the sum of its proper divisors (22903581).

68710731 is a wasteful number, since it uses less digits than its factorization.

68710731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22903580.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 68710731 is about 8289.1936278507. The cubic root of 68710731 is about 409.5826230466.

The spelling of 68710731 in words is "sixty-eight million, seven hundred ten thousand, seven hundred thirty-one".