68721725 has 12 divisors (see below), whose sum is σ = 86661120. Its totient is φ = 54044400.

The previous prime is 68721721. The next prime is 68721733. The reversal of 68721725 is 52712786.

It is not a de Polignac number, because 68721725 - 2² = 68721721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68721721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21821 + ... + 24770.

It is an arithmetic number, because the mean of its divisors is an integer number (7221760).

Almost surely, 2^68721725 is an apocalyptic number.

It is an amenable number.

68721725 is a deficient number, since it is larger than the sum of its proper divisors (17939395).

68721725 is a wasteful number, since it uses less digits than its factorization.

68721725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46660 (or 46655 counting only the distinct ones).

The product of its digits is 47040, while the sum is 38.

The square root of 68721725 is about 8289.8567538891. The cubic root of 68721725 is about 409.6044668505.

The spelling of 68721725 in words is "sixty-eight million, seven hundred twenty-one thousand, seven hundred twenty-five".