68191959 has 16 divisors (see below), whose sum is σ = 99379584. Its totient is φ = 41248800.

The previous prime is 68191951. The next prime is 68191993. The reversal of 68191959 is 95919186.

It is not a de Polignac number, because 68191959 - 2³ = 68191951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68191951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18544 + ... + 21914.

It is an arithmetic number, because the mean of its divisors is an integer number (6211224).

Almost surely, 2^68191959 is an apocalyptic number.

68191959 is a deficient number, since it is larger than the sum of its proper divisors (31187625).

68191959 is a wasteful number, since it uses less digits than its factorization.

68191959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3998.

The product of its digits is 174960, while the sum is 48.

The square root of 68191959 is about 8257.8422726521. The cubic root of 68191959 is about 408.5492230945.

It can be divided in two parts, 6819 and 1959, that added together give a palindrome (8778).

The spelling of 68191959 in words is "sixty-eight million, one hundred ninety-one thousand, nine hundred fifty-nine".