68721219 has 24 divisors (see below), whose sum is σ = 113667840. Its totient is φ = 39192048.

The previous prime is 68721199. The next prime is 68721239. The reversal of 68721219 is 91212786.

It is an interprime number because it is at equal distance from previous prime (68721199) and next prime (68721239).

It is not a de Polignac number, because 68721219 - 2⁵ = 68721187 is a prime.

It is a super-2 number, since 2×68721219² = 9445211881691922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68721239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51442 + ... + 52760.

It is an arithmetic number, because the mean of its divisors is an integer number (4736160).

Almost surely, 2^68721219 is an apocalyptic number.

68721219 is a deficient number, since it is larger than the sum of its proper divisors (44946621).

68721219 is a wasteful number, since it uses less digits than its factorization.

68721219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159 (or 2156 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 68721219 is about 8289.8262346083. The cubic root of 68721219 is about 409.6034615383.

The spelling of 68721219 in words is "sixty-eight million, seven hundred twenty-one thousand, two hundred nineteen".