68189739 has 16 divisors (see below), whose sum is σ = 94832640. Its totient is φ = 43534080.

The previous prime is 68189731. The next prime is 68189743. The reversal of 68189739 is 93798186.

It is not a de Polignac number, because 68189739 - 2³ = 68189731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68189691 and 68189700.

It is not an unprimeable number, because it can be changed into a prime (68189731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5242 + ... + 12800.

It is an arithmetic number, because the mean of its divisors is an integer number (5927040).

Almost surely, 2^68189739 is an apocalyptic number.

68189739 is a deficient number, since it is larger than the sum of its proper divisors (26642901).

68189739 is a wasteful number, since it uses less digits than its factorization.

68189739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7690.

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

The square root of 68189739 is about 8257.7078538781. The cubic root of 68189739 is about 408.5447895849.

The spelling of 68189739 in words is "sixty-eight million, one hundred eighty-nine thousand, seven hundred thirty-nine".