68935591 has 4 divisors (see below), whose sum is σ = 72563800. Its totient is φ = 65307384.

The previous prime is 68935589. The next prime is 68935597. The reversal of 68935591 is 19553986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19553986 = 2 ⋅9776993.

It is a cyclic number.

It is not a de Polignac number, because 68935591 - 2¹ = 68935589 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 (68935597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1814076 + ... + 1814113.

It is an arithmetic number, because the mean of its divisors is an integer number (18140950).

Almost surely, 2^68935591 is an apocalyptic number.

68935591 is a deficient number, since it is larger than the sum of its proper divisors (3628209).

68935591 is a wasteful number, since it uses less digits than its factorization.

68935591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3628208.

The product of its digits is 291600, while the sum is 46.

The square root of 68935591 is about 8302.7459915380. The cubic root of 68935591 is about 410.0289311332.

The spelling of 68935591 in words is "sixty-eight million, nine hundred thirty-five thousand, five hundred ninety-one".