68619959 has 4 divisors (see below), whose sum is σ = 70215816. Its totient is φ = 67024104.

The previous prime is 68619923. The next prime is 68619977. The reversal of 68619959 is 95991686.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68619959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68619959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68619059) 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, 797864 + ... + 797949.

It is an arithmetic number, because the mean of its divisors is an integer number (17553954).

Almost surely, 2^68619959 is an apocalyptic number.

68619959 is a deficient number, since it is larger than the sum of its proper divisors (1595857).

68619959 is a wasteful number, since it uses less digits than its factorization.

68619959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595856.

The product of its digits is 1049760, while the sum is 53.

The square root of 68619959 is about 8283.7164968388. The cubic root of 68619959 is about 409.4021805001.

The spelling of 68619959 in words is "sixty-eight million, six hundred nineteen thousand, nine hundred fifty-nine".