68249159 has 16 divisors (see below), whose sum is σ = 78744960. Its totient is φ = 58500000.

The previous prime is 68249147. The next prime is 68249161. The reversal of 68249159 is 95194286.

It is a cyclic number.

It is not a de Polignac number, because 68249159 - 2¹² = 68245063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68249189) 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, 51809 + ... + 53109.

It is an arithmetic number, because the mean of its divisors is an integer number (4921560).

Almost surely, 2^68249159 is an apocalyptic number.

68249159 is a deficient number, since it is larger than the sum of its proper divisors (10495801).

68249159 is a wasteful number, since it uses less digits than its factorization.

68249159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582.

The product of its digits is 155520, while the sum is 44.

The square root of 68249159 is about 8261.3049211369. The cubic root of 68249159 is about 408.6634227006.

The spelling of 68249159 in words is "sixty-eight million, two hundred forty-nine thousand, one hundred fifty-nine".