68680749 has 8 divisors (see below), whose sum is σ = 92158240. Its totient is φ = 45495216.

The previous prime is 68680727. The next prime is 68680789. The reversal of 68680749 is 94708686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68680749 - 2¹² = 68676653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68680698 and 68680707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68680789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72439 + ... + 73380.

It is an arithmetic number, because the mean of its divisors is an integer number (11519780).

Almost surely, 2^68680749 is an apocalyptic number.

It is an amenable number.

68680749 is a deficient number, since it is larger than the sum of its proper divisors (23477491).

68680749 is a wasteful number, since it uses less digits than its factorization.

68680749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145979.

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 68680749 is about 8287.3849313279. The cubic root of 68680749 is about 409.5230404428.

The spelling of 68680749 in words is "sixty-eight million, six hundred eighty thousand, seven hundred forty-nine".