68722819 has 4 divisors (see below), whose sum is σ = 74970360. Its totient is φ = 62475280.

The previous prime is 68722813. The next prime is 68722831. The reversal of 68722819 is 91822786.

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 68722819 - 2⁹ = 68722307 is a prime.

It is a super-2 number, since 2×68722819² = 9445651702613522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68722813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3123754 + ... + 3123775.

It is an arithmetic number, because the mean of its divisors is an integer number (18742590).

Almost surely, 2^68722819 is an apocalyptic number.

68722819 is a deficient number, since it is larger than the sum of its proper divisors (6247541).

68722819 is a wasteful number, since it uses less digits than its factorization.

68722819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6247540.

The product of its digits is 96768, while the sum is 43.

The square root of 68722819 is about 8289.9227378788. The cubic root of 68722819 is about 409.6066403743.

The spelling of 68722819 in words is "sixty-eight million, seven hundred twenty-two thousand, eight hundred nineteen".