68819739 has 4 divisors (see below), whose sum is σ = 91759656. Its totient is φ = 45879824.

The previous prime is 68819731. The next prime is 68819743. The reversal of 68819739 is 93791886.

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 68819739 - 2³ = 68819731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68819691 and 68819700.

It is not an unprimeable number, because it can be changed into a prime (68819731) 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, 11469954 + ... + 11469959.

It is an arithmetic number, because the mean of its divisors is an integer number (22939914).

Almost surely, 2^68819739 is an apocalyptic number.

68819739 is a deficient number, since it is larger than the sum of its proper divisors (22939917).

68819739 is a wasteful number, since it uses less digits than its factorization.

68819739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22939916.

The product of its digits is 653184, while the sum is 51.

The square root of 68819739 is about 8295.7663298818. The cubic root of 68819739 is about 409.7991064198.

The spelling of 68819739 in words is "sixty-eight million, eight hundred nineteen thousand, seven hundred thirty-nine".