68720699 has 4 divisors (see below), whose sum is σ = 68758536. Its totient is φ = 68682864.

The previous prime is 68720689. The next prime is 68720719. The reversal of 68720699 is 99602786.

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 68720699 - 2⁴ = 68720683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68720629) 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, 16049 + ... + 19874.

It is an arithmetic number, because the mean of its divisors is an integer number (17189634).

Almost surely, 2^68720699 is an apocalyptic number.

68720699 is a deficient number, since it is larger than the sum of its proper divisors (37837).

68720699 is a wasteful number, since it uses less digits than its factorization.

68720699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37836.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 68720699 is about 8289.7948708035. The cubic root of 68720699 is about 409.6024284060.

The spelling of 68720699 in words is "sixty-eight million, seven hundred twenty thousand, six hundred ninety-nine".